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Service Source

PowerBook G4 (12-inch)
PowerBook G4 (12-inch) PowerBook G4 (12-inch DVI) Updated September 16, 2003

2003 Apple Computer, Inc. All rights reserved.

Service Source

Take Apart
PowerBook G4 (12-inch) PowerBook G4 (12-inch DVI)

2003 Apple Computer, Inc. All rights reserved.

General Information

Overview
Some of the key features that distinguish these computers from earlier notebook models include: 12-inch active-matrix display in aluminum alloy enclosure built-in Bluetooth slot load optical drive optional AirPort Extreme Card and Base Station

General Information

PowerBook G4 (12-inch) Take Apart - 1

Model Differences
The external housing of the PowerBook G4 (12-inch DVI) model looks the same as the PowerBook G4 (12-inch) model except for one port. To distinguish the models, look for a mini-DVI port (shown below) on the PowerBook G4 (12-inch DVI) computer. PowerBook G4 (12-inch DVI)

The mini-DVI port is used with an adapter cable to connect the computer to a monitor, television, VCR, or other video device. The adapter cables that can be used with this port include a mini-DVI-to-DVI adapter, a mini-DVI-to-VGA adapter, and a mini-DVI-to-S-Video adapter. By contrast, the PowerBook G4 (12-inch) computer has a video-out VGA port instead of a mini-DVI port. PowerBook G4 (12-inch)

Specific model differences that are noted in the Take Apart procedures include Reed Switch Board and Cable--For the PowerBook G4 (12-inch DVI) model, this part is called the "Hall Effect Sensor Board and Cable," but the procedure is the same. DC-to-DC Board--The component layout on the board differs, but the procedure is the same. Heatsink--The heatsink shape and thermal pad placement differs. Inner Frame--The main frame shape differs, but the procedure is similar. RJ11 Modem Board--The procedure is the same, but the placement of the tape that secures the cable differs. Fan--The fan is secured to the heatsink in the PowerBook G4 (12-inch) model, but it is secured to the inner frame in the PowerBook G4 (12-inch DVI) model. Logic Board--The component layout on the board differs, but the procedure is the same. Optical Drive--The slot load bezel must be transferred to a replacement optical drive for the PowerBook G4 (12-inch) model only. Important: Unless other specific differences are noted, procedures in this chapter apply to both models. 2 - PowerBook G4 (12-inch) Take Apart General Information

Tools
Most of the tools required for taking apart these computers are the same as for earlier notebook models; however, there are three new tools: 1.5 mm hex driver (small hex head screwdriver) for the top case and display housing 4 mm socket wrench or needlenose pliers for the DC-to-DC board tweezers or needlenose pliers (for replacing a foot or for routing thin cables such as the AirPort antenna cable) The following tools are recommended for these computers: Coin ESD wriststrap and mat Small soft cloth Black stick (or other nonconductive nylon or plastic flat-blade tool) #0 Phillips screwdriver (magnetized) #1 Phillips screwdriver (magnetized) Jeweler's flat-blade screwdriver 1.5 mm hex driver 4 mm socket wrench or needlenose pliers Important: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray). If doing a complete disassembly, note the screws removed from each location in the computer. Warning: Check the screw lengths before installing the screws. Installing a longer screw in the wrong place can permanently damage the housing or an internal part.

Pictures in this Chapter
Because in some cases the computer was photographed at a pre-release stage, some of the images pictured in this chapter show boards that are red, rather than green. However, production models include green boards.

General Information

PowerBook G4 (12-inch) Take Apart - 3

Serial Number Location
The serial number is located in the battery bay.

4 - PowerBook G4 (12-inch) Take Apart

General Information

Battery

Tools
This procedure requires the following tools: Soft cloth Coin

Part Location

Preliminary Steps
Warning: Always shut down the computer before opening it to avoid damaging its internal components or causing injury. After you shut down the computer, the internal components can be very hot. Let the computer cool down for 30 minutes before continuing.

Battery

PowerBook G4 (12-inch) Take Apart - 5

Procedure
Warning: If the computer has been recently operating, allow it to cool down before performing this procedure. 1. Shut down the computer. 2. Unplug the power adapter, phone cord, and any other cables connected to the computer. 3. Turn over the computer and place it on a soft cloth. 4. Use a coin to release the battery lock. 5. Lift the battery out of the battery bay.

6. Install the replacement battery, and reassemble and test the computer.

6 - PowerBook G4 (12-inch) Take Apart

Battery

Feet

Tools
This procedure requires the following tools: Foot kit Tweezers or needlenose pliers Soft cloth

Preliminary Step
Before you begin, identify the type of foot that needs replacement. Check the bottom case of the computer, and compare it with the images in this table:

Plug Area on Bottom Case
Missing plug

Not available for replacement

Matching Foot

Action

Do not perform the foot replacement.

Battery plug

Battery foot

Continue with the procedure, matching the foot to the plug on the battery. Continue with the procedure, matching the foot to the plug on the bottom case. Continue with the procedure, matching the foot to the plug on the bottom case.

Case plug

Case foot

Case plug

Case foot

Feet

PowerBook G4 (12-inch) Take Apart - 7

Procedure
Warning: The glue used in this procedure can bond instantly to skin. Do not touch the glue. In the event of contact, review the safety instructions at the end of this document. For additional information, refer to the glue manufacturer: Elmer's Products, Inc. Columbus, OH. 43215-3799 www.krazyglue.com 1. Place the computer upside down on a clean, lint-free cloth or other nonabrasive surface. 2. Select a foot from the kit that matches the plug on the bottom case. (Refer to the images shown in the table.) Do not use a foot that does not match. 3. Make sure the plug area on the bottom case is clean. If any portion of the soft rubber foot remains, remove it so that only the hard plastic plug is visible (as shown below). Battery Plug Case Plug

Important: Notice the inner ring of the plug. When positioning the foot, make sure the textured plane of the rubber foot fits into the compatible ring in the plug. This ensures a balanced and level fitting.

8 - PowerBook G4 (12-inch) Take Apart

Feet

4. Warning: GLUE IS AN EYE AND SKIN IRRITANT. BONDS SKIN INSTANTLY. Do not touch the glue at any time. Before opening the glue, review the safety instructions at the end of this document. Important: The glue tube included in the kit is sealed until first use. Do not break the seal until you are ready to use the glue. To break the seal, hold the tube upright and away from you. Place the hollow nozzle cap on the tube and tighten it all the way down. The tube is then ready to dispense the glue through the nozzle cap.

5. Apply one drop of glue to the plug on the bottom case. Do not spread the glue. 6. Using tweezers or needlenose pliers, carefully position the new foot so its textured surface fits into the inner ring of the plug. 7. Using the end of the tweezers or pliers--not your finger--lightly press and hold the foot in place for 30 seconds.

8. Before turning over the computer, allow the glue to set for at least 15 minutes. 9. Discard the tube of glue. SAFETY INSTRUCTIONS: GLUE IS AN EYE AND SKIN IRRITANT. BONDS SKIN INSTANTLY. Contains ethyl cyanoacrylate. Avoid contact with skin and eyes. If eye or mouth contact occurs, hold eyelid or mouth open and rinse thoroughly but gently with water only for 15 minutes and GET MEDICAL ATTENTION. Liquid glue will sting eye temporarily. Solidified glue may irritate eye like a grain of sand and should be treated by an eye doctor. If skin bonding occurs, soak in acetone-based nail polish remover or warm soapy water and carefully peel or roll skin apart (do not pull). Contact through clothing may cause skin burn. If spilled on clothing, flush with cold water. Avoid prolonged breathing of vapors. Use with adequate ventilation. KEEP OUT OF REACH OF CHILDREN.

Feet

PowerBook G4 (12-inch) Take Apart - 9

Memory Door and Memory Card

Tools
This procedure requires the following tools: Soft cloth #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool)

Part Location

Preliminary Steps
Before you begin, remove the battery.

Procedure
Warning: If the computer has been recently operating, allow it to cool down before performing this procedure.

10 - PowerBook G4 (12-inch) Take Apart

Memory Door and Memory Card

1. Place the computer upside down on a soft cloth. 2. Remove the four identical screws from the memory door. 3. Use a black stick to lift off the memory door.

4. Touch a metal surface inside the computer to discharge static electricity from your body. 5. If a memory card is already installed, release it by spreading apart the tabs in the expansion slot from the notches in the card. Allow the card to pop up slightly, and pull it out of the memory slot.

Memory Door and Memory Card

PowerBook G4 (12-inch) Take Apart - 11

6. Insert the replacement memory card into the expansion slot at a 30-degree angle.

7. Make sure the memory card is fully inserted. Check that the notches in the card clear the tabs as you press down on the sides of the card to lock it into place.

8. Install the memory door. Be careful not to overtighten the screws. 9. Install the battery, and test the computer.

12 - PowerBook G4 (12-inch) Take Apart

Memory Door and Memory Card

AirPort Extreme Card

Tools
This procedure requires a black stick (or other nonconductive nylon or plastic flat-blade tool).

Part Location

Preliminary Steps
Before you begin, remove the battery.

AirPort Extreme Card

PowerBook G4 (12-inch) Take Apart - 13

Procedure
Warning: If the computer has been recently operating, allow it to cool down for 30 minutes before performing this procedure. 1. Touch a metal surface inside the battery bay to discharge static electricity from your body.

2. Open the door to the AirPort slot. 3. If an optional AirPort Extreme Card is already installed, use a black stick to un-loop the pull tab.

14 - PowerBook G4 (12-inch) Take Apart

AirPort Extreme Card

4. Gently disconnect the AirPort antenna cable.

5. Use the pull tab to pull out the card.

AirPort Extreme Card

PowerBook G4 (12-inch) Take Apart - 15

6. Slide the replacement AirPort Extreme Card with the serial number facing up into the slot, as shown.

16 - PowerBook G4 (12-inch) Take Apart

AirPort Extreme Card

7. Connect the end of the antenna cable to the card. 8. Loop the clear plastic tab under the card so that the tab secures the antenna cable and tucks into the slot.

Note: The AirPort slot on the bottom case has a recessed inner slot designed for the clear plastic tab to tuck into.

9. Close the AirPort door, and reassemble and test the computer.

AirPort Extreme Card

PowerBook G4 (12-inch) Take Apart - 17

Keyboard

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card

18 - PowerBook G4 (12-inch) Take Apart

Keyboard

Procedure
1. With the computer upside down on a soft cloth, remove the single screw and small EMI shield from the memory card bay.

Replacement Note: Make sure you replace the screw and EMI shield so that the EMI shield is positioned with the finger-like projection pointing up.

Keyboard

PowerBook G4 (12-inch) Take Apart - 19

2. Open the computer, and locate the following keys: F1 F2 F11 F12

3. Important: Using a black stick, carefully pry up each of the four keys from the left side of each key. The keys are easily removed from the left side without damaging the keyboard.

20 - PowerBook G4 (12-inch) Take Apart

Keyboard

4. Use a black stick or flat-blade screwdriver to lift off the two round stickers that are located between the two key mechanisms. Reserve the stickers for replacement.

5. Remove the screw under each of the stickers.

Keyboard

PowerBook G4 (12-inch) Take Apart - 21

6. Lift up the top two corners of the keyboard, and move the keyboard toward the display to clear the tabs at the bottom of the keyboard.

22 - PowerBook G4 (12-inch) Take Apart

Keyboard

7. Flip the keyboard over and lay the keyboard flat on the trackpad. 8. Use a black stick to carefully remove the aluminum tape that covers the keyboard connector. You will need to reuse the tape when reassembling the computer.

9. Peel up the keyboard cable from its adhesive. Using a black stick, pry up the tabs at the ends of the connector, and then pull the cable straight up to disconnect it.

Keyboard

PowerBook G4 (12-inch) Take Apart - 23

10. Install the replacement keyboard. Make sure you Install the foil tape in the recessed area over the keyboard connector. Set the tabs at the bottom of the keyboard into the slots in the top case. Press the keyboard into place, and install the screws and round stickers. Install the function keys: Position the key directly over the scissor mechanism. Press the key onto the scissor. Check the operation of the key. Close the display and install the final screw in the memory bay.

11. Reassemble and test the computer.

24 - PowerBook G4 (12-inch) Take Apart

Keyboard

Top Case

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Hex 1.5 mm screwdriver Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard

Top Case

PowerBook G4 (12-inch) Take Apart - 25

Procedure
1. Warning: The screws in the battery bay require holding the screwdriver at an angle. Be careful not to strip the screws. Note: Avoid scratching the external housing by using care when removing the screws. You might want to cover part of the housing with a soft cloth as you remove screws. With the computer upside down on a soft cloth, remove the three screws from the bottom case at the battery bay.

2. Remove the screws near the display hinge.

26 - PowerBook G4 (12-inch) Take Apart

Top Case

3. Open the display, and with the computer upright, remove the following 13 screws from the top case: one Hex, 16.5 mm long screw at upper right corner near power button one Hex, 7 mm long screw at upper left corner near microphone one #0 Phillips, 15 mm long screw in keyboard well four #0 Phillips, 4.5 mm long screws in keyboard well six #0 Phillips, 2.5 mm long screws in keyboard well Replacement Note: When replacing the top case screws, install the three 2.5-mm long screws at the right side (optical drive side) first.

4. Carefully peel up the two pieces of foil tape that cover the microphone cable, power cable, and trackpad cable. Reserve the tape when reassembling the computer. 5. Remove the remaining screw from the top case.

Top Case

PowerBook G4 (12-inch) Take Apart - 27

6. Remove two screws from the front right side of the top case. Note: For the PowerBook G4 (12-inch DVI) model, the shape of the two 3-mm long screws differs from the screws used in the PowerBook G4 (12-inch) model at this location. Although the screw length is the same; the screw has a collar under the screw head, and this type of screw cannot be used in the PowerBook G4 (12-inch) model.

Replacement Note: In addition to securing the top case to the bottom case, the two 3-mm long screws help secure an inner bracket to the battery well. If the bracket becomes loose during disassembly, make sure it is installed in the bottom case before replacing the top case.

7. Remove two screws from the front left side of the top case. Replacement Note: When installing the top case, install these two 5.5-mm long screws before installing the 3-mm long screws.

28 - PowerBook G4 (12-inch) Take Apart

Top Case

8. Use a black stick running along the edge of the top case to loosen--but not remove-- the top case from the bottom case. Use equal pressure at the front, left, and right corners.

Top Case

PowerBook G4 (12-inch) Take Apart - 29

9. In the keyboard well, pull up the looped end of the trackpad cable to disconnect it.

10. Raise the top case up slightly from the bottom case until you can access the cables that are connected under the top case. 11. Important: Do not forcefully remove the top case. With the cables still connected, carefully move the top case aside to disconnect the microphone cable and power cable.

12. Remove the top case from the computer.

30 - PowerBook G4 (12-inch) Take Apart

Top Case

13. The top case includes the following: Microphone cable Trackpad and trackpad cable Power button and cable Tape Welded EMI strips Magnet in keyboard well

Top Case

PowerBook G4 (12-inch) Take Apart - 31

14. Before installing a replacement top case, check the cable routing of the Microphone cable Trackpad cable Power button cable Make sure the cables are routed correctly and cannot be pinched when installing the top case.

15. Install the replacement top case, and reassemble and test the computer.

32 - PowerBook G4 (12-inch) Take Apart

Top Case

Reed Switch Board and Cable: PowerBook G4 (12-inch)

Tools
This procedure requires the following tools: Phillips #0 screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool)

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard Top case

Reed Switch Board and Cable: PowerBook G4 (12-

PowerBook G4 (12-inch) Take Apart - 33

Procedure
1. Remove the screw from the reed switch board. Warning: When replacing the board, make sure you use the same screw. A longer screw could scratch the optical media. 2. Tilt the board up and away from the tab at the battery area. 3. Lift up the tape from the corner of the optical drive, if provided. 4. Disconnect the 3-pin connector from CN4 at the DC-to-DC board.

5. Install the replacement reed switch board and cable, and reassemble and test the computer.

34 - PowerBook G4 (12-inch) Take Apart

Reed Switch Board and Cable: PowerBook G4 (12-

Hall Effect Sensor Board and Cable: PowerBook G4 (12-inch DVI)

Tools
This procedure requires the following tools: Phillips #0 screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool)

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard Top case Hall Effect Sensor Board and Cable: PowerBook G4 PowerBook G4 (12-inch) Take Apart - 35

Procedure
1. Remove the screw from the hall effect sensor board. Warning: When replacing the board, make sure you use the same screw. A longer screw could scratch the optical media. 2. Remove the tape, if provided, from the corner of the optical drive, and disconnect the 3-pin connector from CN4 at the DC-to-DC board. 3. Remove the board with cable from the computer assembly.

4. Install the replacement hall effect sensor board and cable, and reassemble and test the computer.

36 - PowerBook G4 (12-inch) Take Apart

Hall Effect Sensor Board and Cable: PowerBook G4

Hard Drive

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card

Hard Drive

PowerBook G4 (12-inch) Take Apart - 37

Keyboard Top case

Procedure
1. Disconnect the hard drive flex cable.

2. Remove two screws from the hard drive bracket.

38 - PowerBook G4 (12-inch) Take Apart

Hard Drive

3. Use the flex cable to lift up the hard drive, bracket, and cable from the computer housing.

4. Turn over the hard drive and remove the two screws from the underside of the bracket.

Hard Drive

PowerBook G4 (12-inch) Take Apart - 39

5. Peel up the flex cable from its double-sided tape. 6. Use a black stick to pry the flex cable connector up slightly on each side, and then pull it straight off the drive. Be careful not to bend any pins.

7. Remove the two screws and grommets from the opposite side of the drive.

8. Replacement Note: When installing the replacement drive, make sure the center flange of the hard drive bracket fits over the small post on the computer frame.

9. Install the replacement hard drive, and reassemble and test the computer.

40 - PowerBook G4 (12-inch) Take Apart

Hard Drive

Modem

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool)

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard Top case

Modem

PowerBook G4 (12-inch) Take Apart - 41

Procedure
1. Remove the two screws from the modem board.

2. Use a black stick to tilt up the modem and disconnect it from the logic board.

42 - PowerBook G4 (12-inch) Take Apart

Modem

3. At the other end of the modem, disconnect the modem cable from the connector.

Replacement Note: When placing the replacement modem on the logic board, be sure to align the board over the standoffs and connector on the logic board.

Modem

PowerBook G4 (12-inch) Take Apart - 43

Replacement Warning: For the PowerBook G4 (12-inch DVI) model, make sure you reapply the transparent tape over the end of the modem so it overlaps the heatsink at the bottom of the fan, as shown. PowerBook G4 (12-inch DVI)

4. Install the replacement modem, and reassemble and test the computer.

44 - PowerBook G4 (12-inch) Take Apart

Modem

DC-to-DC Board

Tools
This procedure requires the following tools: #0 Phillips screwdriver (magnetized preferred) Black stick (or other nonconductive nylon or plastic flat-blade tool) 4 mm socket wrench or needlenose pliers Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location
Note: Although this section pictures the DC-to-DC board used in the PowerBook G4 (12inch DVI) model, the procedure is the same for both models.

DC-to-DC Board

PowerBook G4 (12-inch) Take Apart - 45

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard Top case Hard drive Modem

Procedure
1. Disconnect the sleep light cable and the reed switch (or hall effect sensor board) cable from the DC-to-DC board.

46 - PowerBook G4 (12-inch) Take Apart

DC-to-DC Board

2. Remove the three screws from the DC-to-DC board. Note: When removing the 3 mm-long screw, the magnetic latch might draw the screw toward it. The 14-mm long screw has a hex head and requires a needlenose pliers or socket wrench to remove it. Replacement Note: When replacing the DC-to-DC board, install the screws in a clockwise direction, starting with the long hex head screw.

DC-to-DC Board

PowerBook G4 (12-inch) Take Apart - 47

3. Remove the two screws at the battery connector.

4. Lift off the EMI strip from the battery connector. Be sure to replace it when installing the replacement DC-to-DC board.

48 - PowerBook G4 (12-inch) Take Apart

DC-to-DC Board

5. Place a black stick just under the top edge of the board at the modem standoff. Disconnect the DC-to-DC board from the logic board by prying up the DC-to-DC board and removing it from the computer assembly.

6. Install the replacement DC-to-DC board, and reassemble and test the computer.

DC-to-DC Board

PowerBook G4 (12-inch) Take Apart - 49

Heatsink and Fan Assembly: PowerBook G4 (12-inch)

Tools
This procedure requires the following tools: #0 Phillips screwdriver #1 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card

50 - PowerBook G4 (12-inch) Take Apart

Heatsink and Fan Assembly: PowerBook G4 (12-

Keyboard Top case Modem

Procedure
1. Warning: The cone of the subwoofer, located below the heatsink and to the right of the fan, is a sensitive device. Avoid touching the subwoofer cone as you perform this procedure. 2. Peel up the tape if any of the following screws are covered. Remove the following screws from the heatsink: Two 6 mm long #0 Phillips screws Two 7.5 mm long #1 Phillips screws with springs One 13 mm long #0 Phillips screw One 4.5 mm long #0 Phillips screw

Heatsink and Fan Assembly: PowerBook G4 (12-

PowerBook G4 (12-inch) Take Apart - 51

3. Remove the tape that covers the heatsink and secures the cables in place. 4. Near the fan, peel up the tape and remove the following screws: One 3 mm long screw One 6 mm long screw One 13 mm long screw

5. Peel up the yellow tape, and disconnect the inverter cable that runs along the top of the fan from the logic board. 6. Remove the transparent tape at the bottom of the fan, and disconnect the fan cable. Replacement Note: When installing the replacement heatsink assembly, note that the fan cable is routed beneath the computer frame. Replacement Warning: Make sure you apply the transparent tape over the bottom of the fan so it covers the same area.

52 - PowerBook G4 (12-inch) Take Apart

Heatsink and Fan Assembly: PowerBook G4 (12-

7. Holding the heatsink at the crossbar, begin to lift up the heatsink assembly, being careful where it catches on remaining tape and the chassis. Use a black stick to pry up the middle right corner of the heatsink plate. Warning: To avoid bending the heatsink, support the heatsink as it is removed.

8. Route the fan cable through the slot in the computer frame.

Heatsink and Fan Assembly: PowerBook G4 (12-

PowerBook G4 (12-inch) Take Apart - 53

9. Note the routing of the remaining cables and the placement of tape once the heatsink is removed.
.

10. Install the replacement heatsink and fan assembly, and reassemble and test the computer.

54 - PowerBook G4 (12-inch) Take Apart

Heatsink and Fan Assembly: PowerBook G4 (12-

Heatsink: PowerBook G4 (12-inch DVI)

Tools
This procedure requires the following tools: #0 Phillips screwdriver #1 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard Top case Modem

Heatsink: PowerBook G4 (12-inch DVI)

PowerBook G4 (12-inch) Take Apart - 55

Procedure
1. Warning: The cone of the subwoofer, located below the heatsink and to the right of the fan, is a sensitive device. Avoid touching the subwoofer cone as you perform this procedure. 2. Peel up the tape if any of the following screws are covered. Remove the following screws from the heatsink: Three 6 mm long #0 Phillips screws Two 7.5 mm long #1 Phillips screws with springs Two 13 mm long #0 Phillips screws One 4.5 mm long #0 Phillips screw

56 - PowerBook G4 (12-inch) Take Apart

Heatsink: PowerBook G4 (12-inch DVI)

3. Near the fan, peel up the tape that secures the cables to the heatsink. 4. Remove the 3mm-long screw that secures the inverter cable to the frame. 5. Disconnect the inverter cable that runs along the top of the fan from the logic board.

6. Use a black stick to pry up the lower right side of the heatsink plate. Holding the heatsink at the crossbar, begin to lift up the heatsink assembly, being careful where it catches on remaining tape and the chassis. Warning: To avoid bending the heatsink, support the heatsink as it is removed.

Heatsink: PowerBook G4 (12-inch DVI)

PowerBook G4 (12-inch) Take Apart - 57

7. Check the thermal pads on the heatsink: If you are performing another module replacement and will be using the existing heatsink, peel away the thermal pads on the underside of the heatsink, and apply new thermal pads in the orientation shown. If you are installing a replacement heatsink, make sure that the thermal pads are correctly installed as shown. Note: If any thermal pad residue remains on the logic board, use a black stick to carefully peel it away.

8. When installing the heatsink, first insert the lower flange of the heatsink panel under the frame.

58 - PowerBook G4 (12-inch) Take Apart

Heatsink: PowerBook G4 (12-inch DVI)

9. Install the replacement heatsink, and secure the screws using the following sequence: Warning: Check the screw lengths before installing the screws. Installing a longer screw in the wrong place can permanently damage the bottom case or an internal part. Install the two 7.5-mm long spring screws half way. Install the remaining screws in the order indicated by the circled numbers in the following image. Tighten the two 7.5-mm long spring screws the rest of the way.

10. Reassemble and test the computer.

Heatsink: PowerBook G4 (12-inch DVI)

PowerBook G4 (12-inch) Take Apart - 59

Inner Frame: PowerBook G4 (12-inch)

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard 60 - PowerBook G4 (12-inch) Take Apart Inner Frame: PowerBook G4 (12-inch)



Top case Reed switch Hard drive Modem DC-to-DC board Heatsink with fan

Procedure
1. Note the cable routing and placement of tape before disconnecting cables. Replacement Note: Reserve the tape for securing cables after the frame replacement.

Inner Frame: PowerBook G4 (12-inch)

PowerBook G4 (12-inch) Take Apart - 61

2. Warning: The subwoofer cone, located below the right corner of the frame, is a sensitive device. Avoid touching the cone as you perform this procedure. 3. Disconnect the connector from the upper right corner of the logic board. 4. Remove the screw near the right corner of the frame.

5. Near the I/O ports, disconnect the long black cable from the 2-pin connector shorter black cable from the 4-pin connector

62 - PowerBook G4 (12-inch) Take Apart

Inner Frame: PowerBook G4 (12-inch)

6. Pull up the LVDS cable with the pull tab Warning: Be careful not to strain the LVDS cable. 7. Remove the screw at the LVDS cable.

Replacement Note: When reinstalling the LVDS cable, tuck the pull tab under the frame.

Inner Frame: PowerBook G4 (12-inch)

PowerBook G4 (12-inch) Take Apart - 63

8. Peel up the tape, and remove the screw at the RJ11 modem cable board.

9. Tilt up the RJ11 modem cable board and remove the 6-mm long screw (not shown) that secures the frame to the logic board.

64 - PowerBook G4 (12-inch) Take Apart

Inner Frame: PowerBook G4 (12-inch)

10. Remove the two screws at the I/O ports. 11. Remove the EMI strip at the top of the I/O ports.

Inner Frame: PowerBook G4 (12-inch)

PowerBook G4 (12-inch) Take Apart - 65

12. Remove the three screws from the top of the heatsink.

13. Remove the two screws from the lower left corner of the computer assembly.

66 - PowerBook G4 (12-inch) Take Apart

Inner Frame: PowerBook G4 (12-inch)

14. Disconnect the optical drive flex cable.

15. Lift up the frame, being careful where it catches on the optical drive flex cable or other cables.

Inner Frame: PowerBook G4 (12-inch)

PowerBook G4 (12-inch) Take Apart - 67

16. Lift the inner frame out of the computer assembly.

17. Remove the tape that secures the RJ11 board and cable to both sides of the frame. Transfer the RJ11 board and cable to the replacement frame.

68 - PowerBook G4 (12-inch) Take Apart

Inner Frame: PowerBook G4 (12-inch)

18. Install the replacement frame, and reassemble and test the computer. Replacement Note: When installing the replacement frame, note the initial routing of the cables, as shown in the following images:

Inner Frame: PowerBook G4 (12-inch)

PowerBook G4 (12-inch) Take Apart - 69

Inner Frame: PowerBook G4 (12-inch DVI)

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard 70 - PowerBook G4 (12-inch) Take Apart Inner Frame: PowerBook G4 (12-inch DVI)



Top case Reed switch Hard drive Modem DC-to-DC board Heatsink

Procedure
1. Note the cable routing before disconnecting cables. Replacement Note: Reserve the tape for securing cables after the frame replacement.

Inner Frame: PowerBook G4 (12-inch DVI)

PowerBook G4 (12-inch) Take Apart - 71

2. Warning: The subwoofer cone, located below the right corner of the frame, is a sensitive device. Avoid touching the cone as you perform this procedure. 3. Disconnect the connector from the upper right corner of the logic board. 4. Remove the screw near the right corner of the frame.

72 - PowerBook G4 (12-inch) Take Apart

Inner Frame: PowerBook G4 (12-inch DVI)

5. Warning: Be careful not to strain the LVDS cable. Near the I/O ports, disconnect the LVDS cable by using the pull-tab on the connector disconnect the 6-pin connector

Replacement Note: When reinstalling the LVDS cable, tuck the pull-tab under the frame.

Inner Frame: PowerBook G4 (12-inch DVI)

PowerBook G4 (12-inch) Take Apart - 73

6. Near the fan, disconnect the two connectors shown four-pin connector two-pin connector

74 - PowerBook G4 (12-inch) Take Apart

Inner Frame: PowerBook G4 (12-inch DVI)

7. Peel up any remaining tape, and remove the screws from the frame and I/O port shield.

8. Tilt up the RJ11 modem cable board and remove the 6-mm long screw (normally hidden by the RJ11 board).

Inner Frame: PowerBook G4 (12-inch DVI)

PowerBook G4 (12-inch) Take Apart - 75

9. Disconnect the optical drive flex cable.

10. Lift up the frame, being careful where it catches on the optical drive flex cable or other cables.

76 - PowerBook G4 (12-inch) Take Apart

Inner Frame: PowerBook G4 (12-inch DVI)

11. Lift the inner frame out of the computer assembly.

Inner Frame: PowerBook G4 (12-inch DVI)

PowerBook G4 (12-inch) Take Apart - 77

12. Remove the tape that secures the RJ11 board and cable to both sides of the frame. Transfer the RJ11 board and cable to the replacement frame.

13. Remove the screws from the fan. Transfer the fan to the replacement frame. (Refer to "Fan" in this chapter.) Replacement Note: Check that the replacement frame includes a thermal pad next to the fan, as shown by the blue square in the following image.

78 - PowerBook G4 (12-inch) Take Apart

Inner Frame: PowerBook G4 (12-inch DVI)

14. Install the replacement frame, and reassemble and test the computer. Replacement Note: Make sure you install the top EMI strip at the port side of the replacement frame.

Inner Frame: PowerBook G4 (12-inch DVI)

PowerBook G4 (12-inch) Take Apart - 79

RJ11 Modem Board and Cable: PowerBook G4 (12-inch)

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard 80 - PowerBook G4 (12-inch) Take Apart RJ11 Modem Board and Cable: PowerBook G4 (12-



Top case Reed switch Hard drive Modem DC-to-DC board Heatsink with fan Inner Frame

Procedure
1. With the inner frame removed from the computer, remove the tape that secures the RJ11 board and cable to both sides of the frame. Replacement Note: Reapply the tape to the frame. Refer to the RJ11 cable routing in the images below.

RJ11 Modem Board and Cable: PowerBook G4 (12-

PowerBook G4 (12-inch) Take Apart - 81

2. Remove the EMI shield from the RJ11 board. The board includes the attached cable and connector.

3. Secure the replacement RJ11 modem board and cable to the frame, and reassemble and test the computer.

82 - PowerBook G4 (12-inch) Take Apart

RJ11 Modem Board and Cable: PowerBook G4 (12-

RJ11 Modem Board and Cable: PowerBook G4 (12-inch DVI)

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard RJ11 Modem Board and Cable: PowerBook G4 (12PowerBook G4 (12-inch) Take Apart - 83



Top case Hall effect sensor board Hard drive Modem DC-to-DC board Heatsink Inner Frame

Procedure
1. With the inner frame removed from the computer, remove the tape that secures the RJ11 board and cable to both sides of the frame. Replacement Note: Route the RJ11 cable and reapply the tape to the frame, as shown.

84 - PowerBook G4 (12-inch) Take Apart

RJ11 Modem Board and Cable: PowerBook G4 (12-

2. Remove the EMI shield from the RJ11 board. The board includes the attached cable and connector.

3. Secure the replacement RJ11 modem board and cable to the frame, and reassemble and test the computer.

RJ11 Modem Board and Cable: PowerBook G4 (12-

PowerBook G4 (12-inch) Take Apart - 85

Fan: PowerBook G4 (12-inch DVI)

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard Top case Hall effect Sensor Board 86 - PowerBook G4 (12-inch) Take Apart Fan: PowerBook G4 (12-inch DVI)



Hard drive Modem DC-to-DC board Heatsink Inner Frame

Procedure
1. With the inner frame removed from the computer, remove the three identical screws that secure the fan to the frame.

Fan: PowerBook G4 (12-inch DVI)

PowerBook G4 (12-inch) Take Apart - 87

2. Note the routing of the fan cable in the channel of the frame. Replacement Note: Route the fan cable as shown.

3. Secure the replacement fan to the frame, and reassemble and test the computer.

88 - PowerBook G4 (12-inch) Take Apart

Fan: PowerBook G4 (12-inch DVI)

Sleep Light

Tools
This procedure requires the following tools: #0 Phillips screwdriver

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card Keyboard Top case Reed switch Hard drive Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached)

Sleep Light

PowerBook G4 (12-inch) Take Apart - 89

Procedure
1. Remove the screw from the sleep light board. 2. Remove the board from the bottom case.

3. Replacement Note: Make sure the bottom case has the sleep light pipe installed before installing the replacement sleep light board.

4. Install the replacement sleep light board, and reassemble and test the computer.

90 - PowerBook G4 (12-inch) Take Apart

Sleep Light

Logic Board

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location
PowerBook G4 (12-inch)

Logic Board

PowerBook G4 (12-inch) Take Apart - 91

PowerBook G4 (12-inch DVI)

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard Top case Reed switch Hard drive Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached)

92 - PowerBook G4 (12-inch) Take Apart

Logic Board

Procedure
1. Remove the two screws near the right edge of the board.

Logic Board

PowerBook G4 (12-inch) Take Apart - 93

2. Holding the edges of the board tilt up the logic board.

3. While holding the board vertically, disconnect the DC-in connector cable from the underside of the logic board.

94 - PowerBook G4 (12-inch) Take Apart

Logic Board

4. Remove the side EMI shield from the I/O ports. Warning: When installing the EMI shield over the logic board ports, make sure that the shield fits loosely and the ports are not obstructed. PowerBook G4 (12-inch)

PowerBook G4 (12-inch DVI)

Logic Board

PowerBook G4 (12-inch) Take Apart - 95

5. Install the replacement logic board, and reassemble and test the computer. Replacement Note: Before securing the replacement logic board in the bottom case, make sure the white plastic wireless guide is fitted against the AirPort Extreme Card carrier in the bottom case. (The wireless guide requires no screws to hold it in place.)

96 - PowerBook G4 (12-inch) Take Apart

Logic Board

DC-In Board

This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool)

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard Top case Reed switch (or hall effect sensor board) Hard drive Modem DC-to-DC board

DC-In Board

PowerBook G4 (12-inch) Take Apart - 97

Heatsink with fan Inner frame (with RJ11 board attached) Logic board

Procedure
1. Hold the DC-in board in place as you remove the screw that attaches the board to the bottom case. Note: The screw might be hidden under the mylar sleeve at the lower corner of the board.

2. Pull the flat cable up from the adhesive on the bottom case. 3. Pull the board away from the side of the bottom housing. Use a black stick to lift up the board, if necessary.

98 - PowerBook G4 (12-inch) Take Apart

DC-In Board

4. Remove the round port liner.

5. Install the replacement DC-in board, and reassemble and test the computer.

DC-In Board

PowerBook G4 (12-inch) Take Apart - 99

Optical Drive

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard

100 - PowerBook G4 (12-inch) Take Apart

Optical Drive



Top case Reed switch (or hall effect sensor board) Hard drive Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached) Logic board

Procedure
1. Remove the two screws from the shoulder bracket at the upper right corner of the optical drive.

Optical Drive

PowerBook G4 (12-inch) Take Apart - 101

2. Use a black stick to remove the shoulder bracket.

3. Remove the two screws from the slot load bezel. Replacement Note: When installing the replacement optical drive in the bottom case, make sure the slot load bezel is flush against the slot in the side of the bottom case before installing the screws. Check that the felt at the slot opening is even and not mashed. Replacement Warning: Make sure you use the same screws to secure the bezel. Using the wrong sized screws could permanently damage the drive.

102 - PowerBook G4 (12-inch) Take Apart

Optical Drive

4. Tilt up the optical drive and remove it from the computer.

5. Remove the screws from the L-shaped EMI bracket on the top of the drive. Lift off the bracket.

Optical Drive

PowerBook G4 (12-inch) Take Apart - 103

6. Turn over the drive and remove the three screws from the L-shaped EMI bracket on the bottom of the drive.

7. Remove the bottom L-shaped EMI bracket.

104 - PowerBook G4 (12-inch) Take Apart

Optical Drive

8. Important: For the PowerBook G4 (12-inch DVI) model, the optical drive bezel is included with the replacement drive, so do not remove it. This step applies only to the PowerBook G4 (12-inch) model. Use a black stick to press the tabs and remove the slot load bezel. Pull the bezel straight off the drive.

9. Disconnect the flex cable.

10. Install the replacement optical drive, and reassemble and test the computer.

Optical Drive

PowerBook G4 (12-inch) Take Apart - 105

Bluetooth

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool)

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard Top case Reed switch (or hall effect sensor board) Hard drive

106 - PowerBook G4 (12-inch) Take Apart

Bluetooth



Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached) Logic board Optical drive

Procedure
Warning: The subwoofer, located to the left of the Bluetooth board, is a sensitive device. Avoid touching the subwoofer as you perform this procedure. Warning: To avoid excessive pressure on the Bluetooth board, hold the edge of the board in place as you perform this procedure. 1. If tape covers part of the board, hold the board in place as you remove the tape. 2. Use a black stick to disconnect the 4-pin connector from the board. 3. Holding the Bluetooth cable connector, pull it straight up to disconnect it. 4. Remove the screw from the Bluetooth board.

5. Remove the Bluetooth board from the bottom case. 6. Install the replacement Bluetooth, and reassemble and test the computer.

Bluetooth

PowerBook G4 (12-inch) Take Apart - 107

Subwoofer

Tools
This procedure requires the following tools: #0 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool)

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard Top case Reed switch (or hall effect sensor board) Hard drive Modem DC-to-DC board 108 - PowerBook G4 (12-inch) Take Apart Subwoofer



Heatsink with fan Inner frame (with RJ11 board attached) Logic board Optical drive Bluetooth

Procedure
Warning: The cone of the subwoofer is a sensitive device. Avoid touching the subwoofer cone as you perform this procedure. Warning: To avoid excessive pressure on the subwoofer, hold the edge of the subwoofer in place as you perform this procedure. 1. Remove the tape that covers the screw. 2. Remove the screw from the subwoofer.

3. Remove the remaining tape from the subwoofer and the loose cable.

Subwoofer

PowerBook G4 (12-inch) Take Apart - 109

4. Note: The back edge of the subwoofer adheres to the rear panel. Use a black stick to pry open the adhesive seal at the rear panel. Pivot the subwoofer away from the rear panel, and remove the subwoofer from the bottom case.

5. Install the replacement subwoofer, and reassemble and test the computer.

110 - PowerBook G4 (12-inch) Take Apart

Subwoofer

Display Module

Tools
This procedure requires the following tools: #0 Phillips screwdriver #1 Phillips screwdriver Black stick (or other nonconductive nylon or plastic flat-blade tool) Tweezers or needlenose pliers (optional; for routing the AirPort antenna cable) Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed

Display Module

PowerBook G4 (12-inch) Take Apart - 111



Keyboard Top case Reed switch (or hall effect sensor board) Hard drive Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached) Logic board DC-in board Optical drive Bluetooth Subwoofer

Procedure
Important: This procedure show s the subwoofer and inner rear panel attached to the display module when it is removed from the bottom case. However, you can remove the subwoofer from the bottom case you do not need to remove the subwoofer and display module together. 1. With the computer upside down, remove the two screws from the bottom case.

112 - PowerBook G4 (12-inch) Take Apart

Display Module

2. Remove the two screws near the display hinge.

3. From the inside of the bottom case, carefully remove the tape from the AirPort antenna cable. Warning: Do not tug on the AirPort antenna cable.

4. Note the routing of the AirPort antenna. Using a black stick, start to thread the AirPort antenna cable through the AirPort Extreme Card bay.

Display Module

PowerBook G4 (12-inch) Take Apart - 113

5. Holding the antenna cable near the strain relief, start to pull the antenna cable out through the corner of the card bay.

6. Support the antenna cable as you direct the antenna plug out of the opening in the card bay.

114 - PowerBook G4 (12-inch) Take Apart

Display Module

7. With the display open to a 90-degree angle and resting face-up on the tabletop, lift off the bottom housing from the display.

Important: The display might get caught on the hooks (shown below) on the bottom case. If so, gently twist the bottom case to release it from the display.

Display Module

PowerBook G4 (12-inch) Take Apart - 115

8. Remove the four screws from the display's inner rear panel. Make sure the screwdriver does not touch the speakers.

9. Remove the inner rear panel with attached speakers by routing the cables through the slots in the rear panel. Replacement Note: When installing the rear panel, hold the routed cables away from the path of the screws.

116 - PowerBook G4 (12-inch) Take Apart

Display Module

Replacement Note: When installing the rear panel, check that the twisted pair of speaker cables is completely recessed in the panel and that the tape holds the cables in place.

Replacement Note: Check that the orientation of the cables directed through the rear panel openings are as shown below:

Display Module

PowerBook G4 (12-inch) Take Apart - 117

10. Install the replacement display module, and reassemble and test the computer.

118 - PowerBook G4 (12-inch) Take Apart

Display Module

Bottom Case

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard Top case Reed switch (or hall effect sensor board) Hard drive Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached) Sleep light board Logic board DC-in board Bottom Case PowerBook G4 (12-inch) Take Apart - 119



Optical drive Bluetooth Subwoofer Display module

Procedure
When all preliminary steps are performed, the bottom case is the part that remains.

120 - PowerBook G4 (12-inch) Take Apart

Bottom Case

Display Housing

Tools
This procedure requires the following tools: 1.5 mm hex driver Black stick (or other nonconductive nylon or plastic flat-blade tool) Optional: Credit card (or other thin plastic card)

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard Top case Reed switch (or hall effect sensor board)

Display Housing

PowerBook G4 (12-inch) Take Apart - 121



Hard drive Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached) Logic board DC-in board Optical drive Display module

Procedure
1. Remove the two 5-mm long hex screws from the front bezel.

122 - PowerBook G4 (12-inch) Take Apart

Display Housing

2. Use a black stick or thin plastic credit card around the outer edge of the bezel to separate the display housing tabs from the display assembly. Warning: To avoid damage to the antenna receptors or inner cables, do not poke the black stick or credit card inside the display. Keep the tool at a nearly horizontal plane with the display bezel as you loosen the display assembly from the display housing.

Note: In the image above, the Bluetooth cable appearance differs from the production models of this computer.

Display Housing

PowerBook G4 (12-inch) Take Apart - 123

3. Warning: Handle the display assembly and cables with care. Do not strain or pinch the cables. Do not apply pressure to or bend the antenna receptors. Gently lift the display assembly off of the display housing. With the antenna cables still attached, place the display assembly on the tabletop opposite the display housing. Important: Keep the display assembly and housing in this open orientation (shown below) for the remaining steps.

124 - PowerBook G4 (12-inch) Take Apart

Display Housing

4. Note the routing of the antenna cables. Peel up the tape that holds the cables in place. Warning: Handle the antenna receptors and cables with care. Do not strain or pinch the cables. Do not apply pressure to or bend the antenna receptors. 5. Warning: The tabs that hold the antenna cables in place are delicate. Avoid pressure on the tabs. Using a black stick, release the antenna cables from the inner tabs.

6. Move up the side of the display housing, releasing the cables from the tabs.

Display Housing

PowerBook G4 (12-inch) Take Apart - 125

7. Note: The antenna receptors are held in place with glue at each post. Use a black stick at the end of each antenna receptor to gently pry it off the post.

126 - PowerBook G4 (12-inch) Take Apart

Display Housing

8. Placing the antenna cables and receptors aside, remove the display housing.

Replacement Note: When installing the replacement display housing, make sure the antenna cables are secure under all of the inner tabs that run along the sides and bottom of the display housing.

9. Install the replacement display housing, and reassemble and test the computer.

Display Housing

PowerBook G4 (12-inch) Take Apart - 127

LCD Panel

Tools
This procedure requires the following tools: Phillips #0 screwdriver Black stick or other nonconductive plastic or nylon tool

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard Top case Reed switch (or hall effect sensor board) Hard drive

128 - PowerBook G4 (12-inch) Take Apart

LCD Panel



Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached) Logic board DC-in board Optical drive Display module Display housing

Procedure
Note: Reuse the tape you remove from the LCD panel. 1. Hold the backing for the LCD panel in place as you peel off the tape and disconnect the LCD cable.

LCD Panel

PowerBook G4 (12-inch) Take Apart - 129

2. Remove the two screws from each side of the LCD panel. Note: For the PowerBook G4 (12-inch DVI) model, this step is the same; however, there are no EMI clips bordering the LCD panel, as shown in the PowerBook G4 (12inch) images below.

130 - PowerBook G4 (12-inch) Take Apart

LCD Panel

3. Lift off the long EMI clip at the base of the bezel. 4. Raise up the LCD panel and disconnect the connector to the inverter board.

5. Install the replacement LCD panel, and reassemble and test the computer. Replacement Note: When installing the replacement LCD panel in the display bezel assembly, make sure the cable is connected to the inverter board and routed as shown.

LCD Panel

PowerBook G4 (12-inch) Take Apart - 131

Inverter Board (and Antenna Cable Assembly)

Tools
This procedure requires the following tools: Phillips #0 screwdriver Black stick or other nonconductive plastic or nylon tool Note: To organize the screws you remove from the computer, use a tray with divided compartments (such as a plastic ice cube tray).

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard Top case Reed switch (or hall effect sensor board)

132 - PowerBook G4 (12-inch) Take Apart

Inverter Board (and Antenna Cable Assembly)



Hard drive Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached) Logic board DC-in board Optical drive Display module Display housing LCD panel

Procedure
1. Remove the single screw near the center of the inverter board.

Inverter Board (and Antenna Cable Assembly)

PowerBook G4 (12-inch) Take Apart - 133

2. Lift up the board.

3. Peel away the tape and mylar cover that holds the inverter board and the antenna cable assembly together.

134 - PowerBook G4 (12-inch) Take Apart

Inverter Board (and Antenna Cable Assembly)

4. Separate the antenna cable assembly (board with attached antenna cables and Bluetooth cable) from the inverter board. 5. Remove the screws from the clutch cover.

6. Remove the five screws from the bottom edge of the display bezel

Inverter Board (and Antenna Cable Assembly)

PowerBook G4 (12-inch) Take Apart - 135

7. Separate the clutch cover from the bezel and remove the LVDS cable.

8. Remove the antenna cables and inverter from the clutch cover.

136 - PowerBook G4 (12-inch) Take Apart

Inverter Board (and Antenna Cable Assembly)

Replacement Note: When reinstalling the clutch cover, check that the cables are routed as shown below (Bluetooth cable on the bottom of the clutch):

Inverter Board (and Antenna Cable Assembly)

PowerBook G4 (12-inch) Take Apart - 137

9. From the left side of the bezel, remove the three screws.

10. Important: In the following steps, note that because of the position of the bezel, the designation of right and left differs. For example, the right hinge with bezel brace is removed from the left side of the bezel because you are viewing the bezel from its inner side. Likewise, the left hinge with bezel brace is removed from the right side of the bezel. Remove the right hinge with bezel brace from the left side of the bezel.

138 - PowerBook G4 (12-inch) Take Apart

Inverter Board (and Antenna Cable Assembly)

11. From the right side of the bezel, slide out the left hinge with bezel brace (no screws on this side).

Replacement Note: To distinguish the right hinge with bezel brace from the left hinge with bezel brace, note that the right hinge has three flanges on the outer edge for the three screws.

Inverter Board (and Antenna Cable Assembly)

PowerBook G4 (12-inch) Take Apart - 139

Display Bezel

Part Location

Preliminary Steps
Before you begin, remove the following: Battery Memory door and memory card AirPort Extreme Card, if installed Keyboard Top case Reed switch (or hall effect sensor board) Hard drive Modem DC-to-DC board Heatsink with fan Inner frame (with RJ11 board attached) Logic board DC-in board Optical drive

140 - PowerBook G4 (12-inch) Take Apart

Display Bezel



Display module Display housing LCD panel Inverter (and antenna cable assembly)

Procedure
When all preliminary steps are performed, the display bezel is the part that remains.

Display Bezel

PowerBook G4 (12-inch) Take Apart - 141

Service Source

Troubleshooting
PowerBook G4 (12-inch) PowerBook G4 (12-inch DVI)

2003 Apple Computer, Inc. All rights reserved.

Symptom Charts

How to Use the Symptom Charts
The Symptom Charts included in this chapter will help you diagnose specific symptoms related to the product. The steps to solve a symptom are listed sequentially. You might not need to perform every step before the symptom is solved. Start with the first step, and then test for the symptom. If the symptom persists, replace any modules you removed, go to the next step, and test again. Continue down the list until the symptom is solved. Important: This computer starts up only in Mac OS X. Mac OS 9 is not available as a startup disk and previous versions of the Mac OS should not be installed on this computer.

AirPort Extreme Card
AirPort Extreme Card not recognized
1. Use Software Update in Mac OS X system preferences or see the Apple Software Updates web page to make sure the latest version of AirPort software is installed. 2. Reseat AirPort Extreme Card and make sure AirPort antenna cable is fully connected. 3. Verify settings in Network Preferences pane. 4. Check that AirPort Extreme Card appears in Apple System Profiler under Network overview in System Profile. 5. Replace with known-good AirPort Card. 6. Replace logic board.

AirPort communication erratic
1. Use Software Update in Mac OS X system preferences or see the Apple Software Updates web page to make sure the latest version of AirPort software is installed. 2. Make sure the computer is within antenna range of the other computer or the network's access point. Note: Nearby electronic devices or metal structures can interfere with wireless communication and reduce the antenna range. Repositioning or rotating the computer may improve reception.

Symptom Charts

PowerBook G4 (12-inch) Troubleshooting - 1

3. Check the signal strength shown in the AirPort status icon in the menu bar. Up to four bars can appear. 4. If the symptom remains, refer to the Knowledge Base for the latest articles on computer placement and how to optimize AirPort performance.

Battery
Battery won't charge
1. Make sure that power adapter connector is fully inserted. 2. Remove any connected peripherals. 3. Try known-good power outlet. Green or amber light should glow at power adapter connector. 4. Try known-good power adapter and power cord. Note: Verify that power adapter connector glows amber or green. If the power adapter light is green, turn over the computer and press the battery button. One to five lights glow to show the battery's level of charge. One blinking light indicates that the battery does not have sufficient charge to turn on. 5. Remove battery and reseat it. 6. Reset the power manager by pressing the key combination Control-Option-Shiftpower. Warning: Make sure you do not hold down the "fn" key when resetting the power manager. 7. Update to Mac OS 10.2.4, or boot from external device with 10.2.4. 8. Replace DC-to-DC board. 9. Replace logic board.

Battery won't charge completely
1. If battery reaches 96 percent and doesn't charge further, this is normal operation. Refer to Knowledge Base article 88344 "PowerBook G4, iBook: Battery Does Not Show Full Charge in Mac OS X". 2. If battery charges to 95 percent or less and stops charging before reaching 100 percent, replace DC-to-DC board.

2 - PowerBook G4 (12-inch) Troubleshooting

Symptom Charts

Error Beeps
The computer automatically performs a power-on self test when it is turned on after being fully shut down (not a restart). This section describes what to do if beeps are heard during the startup. Note: The computer has a memory expansion slot that accepts a 1.25-inch (or shorter) PC-2100 compliant, SO-DIMM memory card. Refer to the Memory Replacement instructions for removal and installation.

Computer beeps once at startup
1. One beep means that no RAM is detected. 2. If a RAM card is installed in the expansion slot, remove it and put in known-good and compatible RAM and restart. If symptom does NOT repeat, replace RAM card. If symptom repeats, replace logic board. 3. If no RAM card is installed, replace logic board.

Computer beeps three times at startup
1. Three beeps means that no RAM banks passed memory testing. 2. If a RAM card is installed in the expansion slot, remove it and put in known-good and compatible RAM and restart. If symptom does NOT repeat, replace RAM card. If symptom repeats, replace logic board. 3. If no RAM card is installed, replace logic board.

Computer beeps four times at startup
1. Four beeps indicates a bad checksum for the remainder of the boot ROM. The ROM (which is located on the logic board) is bad. 2. If a RAM card is installed in the expansion slot, remove it and put in known-good and compatible RAM and restart. If symptom does NOT repeat, replace RAM card. If symptom repeats, replace logic