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Dell Latitude C540/C640 Service Manual
DellTM LatitudeTM C540/C640 Service
Manual
Before You Begin
System Components
Hard Drive
Memory Modules, Mini PCI Card, and Modem
Keyboard
Display Assembly, Display Latch, and Hinge Covers
Palm Rest
Microprocessor Thermal Cooling Assembly
Microprocessor Module
Hybrid Cooling Fan
Reserve Battery
Flashing the BIOS
Speaker Assemblies
System Board
Battery and Module Bay Latches
Pin Assignments for I/O Connectors
Notes, Notices, and Cautions
NOTE: A NOTE indicates important information that helps you make better use
of your computer.
NOTICE: A NOTICE indicates either potential damage to hardware or loss of
data and tells you how to avoid the problem.
CAUTION: A CAUTION indicates a potential for property damage,
personal injury, or death.
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Dell Latitude C540/C640 Service Manual
Trademarks used in this text: Dell, the DELL logo, and Latitude are trademarks of Dell Computer
Corporation.
Other trademarks and trade names may be used in this document to refer to either the entities
claiming the marks and names or their products. Dell Computer Corporation disclaims any proprietary
interest in trademarks and trade names other than its own.
April 2003 Rev. A01
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Before You Begin: Dell Latitude C540/C640 Service Manual
Back to Contents Page
Before You Begin
DellTM LatitudeTM C540/C640 Service Manual
Preparing to Work Inside the Computer
Recommended Tools
Screw Identification
Preparing to Work Inside the Computer
CAUTION: Before working inside your computer, read the safety
instructions in your System Information Guide.
CAUTION: Only a certified service technician should perform repairs on
your computer. Damage due to servicing that is not authorized by Dell
is not covered by your warranty.
NOTICE: To avoid damaging the computer, perform the following steps before
you begin working inside the computer.
1. Ensure that the work surface is clean to prevent scratching the computer cover.
2. Save any work in progress and exit all open programs.
3. Turn off the computer and all attached devices.
NOTE: Before turning off the computer, ensure that the computer is not in a
power management mode. If you cannot shut down the computer using the
computer operating system, press and hold the power button for 4 seconds.
4. If the computer is connected (docked) to a docking device, undock it. See the
documentation that came with the docking device for instructions.
5. Disconnect the computer and any attached devices from electrical outlets.
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Before You Begin: Dell Latitude C540/C640 Service Manual
6. To avoid possible damage to the system board, wait 10 to 20 seconds and then
disconnect any attached devices.
7. Disconnect all other external cables from the computer.
8. Remove any installed PC Cards or plastic blanks from the PC Card slot.
9. Close the display and turn the computer upside down on a flat work surface.
NOTICE: To avoid damaging the system board, you must remove the main
battery and secondary battery (if present) before you service the computer.
10. Remove the primary battery from the battery bay and the secondary battery
from the module bay, if a secondary battery is in use.
11. Remove any installed device in the module bay.
12. To dissipate any static electricity while you work, use a wrist grounding strap or
periodically touch an unpainted metal surface.
13. Handle components and cards with care. Do not touch the components or
contacts on a card. Hold a card by it edges or by its metal mounting bracket.
Hold a component such as a microprocessor by its edges, not by its pins.
Recommended Tools
The procedures in this manual require the following tools:
q #1 magnetized Phillips screwdriver
q