The 100CS is one of the lightest and most advanced portable computers available. Utilizing advanced technology and high-speed components, the computer offers multimedia functions, excellent display legibility, battery operation, and IBM PC/AT compatibility. The unit consists of the following features: K Microprocessor
A Pentium ® processor with Voltage Reduction Technology (VRT) that operates at 75 MHz and 3.3/2.9 volts. K Memory
Standard 8 MB of CMOS RAM. This includes 640 KB of conventional memory and 7360 KB of extended memory. K Hard Disk Drive (HDD)
An internal 528 million byte (520MB) HDD. K Floppy Disk Drive (FDD)
A 3.5-inch FDD supports 2HD (1.44 MB) floppy disks and 2DD (720 KB) floppy disks. K Display
A 10.4-inch Dual-scan Supertwist Nematic (DSTN) color LCD with 640 x 480 pixels. The built-in display controller supports 640 x 480 resolution with 64k colors capability on the internal LCD and up to 1024 x 768 resolution with 256 colors on an external CRT. K Keyboard
An easy-to-use 82/84-key keyboard provides a numeric keypad overlay for fast numeric data entry or for cursor and page control. The keyboard supports software that uses a 101- or 102-key enhanced keyboard. K Batteries
Three different batteries: a main battery, a backup battery (for memory backup), and an RTC battery (for Real Time Clock). K Expansion memory slot
An optional 8, 16, or 32 MB memory module can be installed in the memory slot.
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K Parallel port
This port can be used to connect a Centronics compatible printer or other parallel device. The port supports ECP (Extended Capabilities Port) conforming to IEEE·1284. K Serial port (9-pin)
The serial controller is 16550UART compatible. This port can be used to connect such serial devices as a serial printer, serial mouse, or external modem. K RGB port
The female, 15-pin, D-shell connector can be connected to an external SVGA monitor. K Ext. Keyboard/Mouse port
Either a PS/2 compatible keyboard or a PS/2 compatible mouse can be connected to this port. The computer automatically recognizes which device is connected. K PC card slot
A PC card slot supports up to two Personal Computer Memory Card International Association (PCMCIA) standard version release 2.0 cards. The upper and lower slots can each accommodate one Type II (5.0 mm) card, or the lower slot can accommodate one Type III (10.5 mm) card when the upper slot is empty. K Enhanced port replicator port
This port enables connection of an enhanced port replicator. The enhanced port replicator has two PC card slots (Type III), and expands connections to the following devices: PS/2 keyboard, PS/2 mouse, serial port, parallel port, external CRT, AC-in, and AC-out. The NoteDock does not support the following ports: floppy disk, audio in - audio out, joystick, and selectable ID. K AccuPoint
A pointer control stick, located in the center of the keyboard, provides convenient control of the cursor without requiring desk space for a mouse.
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The 100CS Personal Computer is shown in figure 1-1.
Figure 1-1 100CS personal computer The system configuration is shown in figure 1-2.
Figure 1-2 System unit configuration
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1.2
System Unit Block Diagram
Figure 1-3 is a block diagram of the system unit.
Figure 1-3 System board block diagram
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The system board is composed of the following major components: K Microprocessor One Pentium processor with VRT 64-bit microprocessor Pentium processor operates at 75 MHz and 3.3/2.9 volts The math co-processor and 16KB cache memory are integrated into Pentium K Standard RAM 8 MB, four 1Mx16-bit chips 3.3 volt operation No parity bit Access time 70 ns Data transfer is 64-bit width EDO (extended data output) supported K BIOS ROM (Flash EEPROM) 128 KB (one 128Kx8-bit chip) memory 64 KB in the ROM are used for system BIOS 48 KB in the ROM are used for VGA BIOS 16 KB in the ROM are reserved Access time 150 ns Data transfer is 8-bit width K Video RAM 1 MB (Two 256Kx16-bit DRAM) 5 volt operation K Optional memory One expansion memory slot is available for 8, 16, and 32 MB memory modules, which consist of 1 MBx16-bit chips Total maximum memory size is 40 MB (if a 32 MB memory module is installed) 3.3 volt operation No parity bit Access time 60 ns Data transfer is 64-bit width EDO (extended data output) supported K One super integration (SI) The following components: - Two DMACs 82C37 equivalent - Two PICs 82C59 equivalent - Two SIOs 16550 equivalent (One SIO is not used) - Two UARTs 16550 equivalent - One PIT 82C54 equivalent - One FDC TC8565 equivalent - One VFO TC8568 equivalent - One I/O port decoder - One SIO port control - One printer port control supported ECP - One FDD control - One speaker control - One power communication control 100CS 1-5
K System Controller Gate Array (SCPCNT-GA) This gate array has the following functions: · CPU control - SMI control - CPU clock control · Memory control - 64-bit bus memory control - 32-bit bus memory control · Bus control - 64-bit data bus <==>32-bit data bus - 32-bit local bus control · Address latch control · I/O register control · Processing speed control K ISA Bus Controller Gate Array (SISCNT3-GA) This gate array has the following functions: · Bus control - 32-bit data bus <==> 16-bit data bus - ISA bus interface control - ISA bus access control - DMAC control - DMA address generation - I/O control - Suspend/Resume sequence · Memory control - ISA bus interface control - Refresh address generation · I/O register control · Suspend/Resume sequence K PC Card Controller Gate Array (PCMCIA CNT-GA) This gate array has the following functions: · PCMCIA memory card control · PCMCIA I/O card control K I/O Controller Gate Array (IOCNT-GA) This gate array has the following functions: · Internal Communication controller - KBC, main CPU communication register file - KBC interrupt controller - KBC communication controller - I2C bus control (Not used) · Others - Speaker volume adjust PWM control - Sound board interface (Not used) - BIOS-ROM interface - SMI control - IrDA (SIR) control (Not used) 1-6
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K Video Controller C&T F65548 is used. This video controller controls internal DSTN color LCD and external SVGA compatible CRT. K Keyboard Controller (KBC) One M38802M4 chip is used. This KBC includes the keyboard scan controller and keyboard interface controller. The KBC controls the internal keyboard, external keyboard, PS/2 mouse. K Real Time Clock (RTC) One T9934 chip is used. The T9934 has 128 bytes of memory. Fourteen bytes of memory are used for the calendar and clock. The remaining 114 bytes are used for the system configuration data.
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1.3
3.5-inch Floppy Disk Drive
The 3.5-inch FDD is a thin, high-performance reliable drive that supports 720-KB (formatted) 2DD and 1.44-MB (formatted) 2HD 3.5-inch floppy disks. The FDD is shown in figure 1-4.
Figure 1-4 3.5-inch FDD The specifications for the FDD are listed in table 1-1. Table 1-1 3.5-inch FDD specifications Item Storage capacity (KB) Unformatted Formatted Number of heads Number of cylinders Access time (ms) Track to track Average Head settling time Recording track density (tpi) Data transfer rate (Kbps) Rotation speed (rpm) Recording method *1:32 sector/track (256bytes per sector) *2:16 sector/track (256bytes per sector) 2-MB mode 2,000 *1 1,311 2 80 3 181 15 135 500 300 1-MB mode 1,000 *2 655 2 80 3 181 15 135 250 300
Modified Frequency Modulation (MFM)
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2.5-inch Hard Disk Drive
The HDD is a random access non-volatile storage device. It has a non-removable 2.5-inch magnetic disk and mini-winchester type magnetic heads. The computer supports the 520 MB. The HDD is shown in figure 1-5.
Figure 1-5 2.5inch HDD Specifications for the HDD are listed in table 1-2. Table 1-2 2.5-inch HDD specifications Items Storage capacity (million byte) Formatted Number of disks Data heads Data surfaces Bytes per sector Rotation speed (rpm) Recording method Toshiba MK1924FCV 528 2 4 4 512 4200 8-9 RLL IBM DBOA-2528 528 2 3 4 512 4000 1-7 RLL
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1.5
Keyboard
The 82-(USA) or 84-(European) keyboard is mounted on the computer's system unit. The keyboard is connected to the keyboard controller on the system board through a 25-pin flat cable. The computer pointer control stick, located in the center of the keyboard, provides convenient control of the cursor without requiring desk space for a mouse. The keyboard is shown in figure 1-6. See Appendix E for optional keyboard configurations.
Figure 1-6 Keyboard
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DSTN Color LCD
The DSTN Color Liquid Crystal Display (LCD) contains an LCD module, a Fluorescent Lamp (FL), and an FL inverter board. 1.6.1 DSTN Color LCD Module
The DSTN color LCD is backlit and supports 640 x 480 pixels with a Video controller. This video controller includes the functions of Video Graphics Array (VGA). The built-in display controller supports 640 x 480 resolution with 64k colors capability on the internal LCD and up to 1024 x 768 resolution with 256 colors on an external CRT. The LCD receives vertical and horizontal synchronizing signals, 16-bit data signal, 8-bit upper block data signal, 8-bit lower block data signal, and has a shift clock for data transmission. All signals are CMOS-level compatible. The DSTN LCD is shown in figure 1-7. The specifications for the LCD are listed in table 1-3.
Figure 1-7 DSTN color LCD Table 1-3 DSTN color LCD specifications Item Number of Dots Dot pitch Display area Contrast FL current (dots) (mm) (mm) (Typically) (mA) Specifications 640x480 0.33x0.33 217.2 (W)x164.4 (H) 20:1 5.0/3.0 (Bright/Semi-bright)
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1.6.2
DSTN Color Fluorescent Lamp (FL) Inverter Board
The FL inverter board supplies high frequency current to light the LCD's Fluorescent Lamp. The specifications for the FL inverter are listed in table 1-4.
Table 1-4 DSTN color FL inverter board specifications Item Input Output Voltage Power Voltage Current (V) (W) (Vrms) (mA) Specifications 4 to 5.5 4.25 1,100 5.0/3.0 (Bright/Semi-bright)
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1.7
Power Supply
The power supply provides five kinds of voltages to the system board. The power supply has one microprocessor, operates at 500 KHz, and performs the following functions: 1. 2. 3. 4. 5. 6. 7. Determines if the AC cable or battery is connected to the computer. Detects AC output and circuit malfunctions. Controls the LED icon and speaker. Turns the battery charging system on and off and detects a fully charged battery. Determines if the power can be turned on and off. Provides more accurate detection of a low battery. Calculates the remaining battery capacity.
The power supply output rating is specified in table 1-5. Table 1-5 Power supply output rating DC voltage +5 +2.9 +12 +3.3 +4.7 Regulation tolerance (%) ±5 ±5 ±5 ±0.3V ±5
Use for System logic, FDD, HDD, Display CPU Flash ROM, PCMCIA CPU, RAM, GA VRAM, GA
Name VCC CPUV 12V B3V B5V
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1.8
Batteries
The computer has three types of batteries: K Main battery pack K Backup battery K Real Time Clock (RTC) battery
Battery specifications are listed in table 1-6. Table 1-6 Battery specifications Battery name Main battery Backup battery RTC battery Material Nickel Metal Hydride Nickel Metal Hydride Nickel Metal Hydride Output voltage 12 V 7.2 V 3.6 V Capacity 2,600 mAH 110 mAH 30 mAH
1.8.1
Main Battery
The removable main battery pack is the computer's main power source when the AC power cord is not attached. The main battery recharges the backup battery. The backup and main battery maintain the state of the computer when you enable AutoResume. J Battery Icon
The Battery icon is located on top of the back rim of the computer. The icon shows the status of the removable battery pack. The status of each can be determined by color: Orange The AC power cord is connected and charging the battery with the power off. The AC power cord is connected and the battery is fully charged whether the power is on or off.
Green
Blink orange The battery is low. The AC power cord must be connected to recharge the battery. No light Under any other conditions, the LED does not light.
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1.8.2
Battery Charging Control
Battery charging is controlled by a power supply microprocessor that is mounted on the power supply. The microprocessor controls whether the charge is on or off and detects a full charge when the AC power cord and battery are attached to the computer. The system charges the battery using quick charge or trickle charge. J Quick Battery Charge
When the AC power cord is attached, there are two types of charge: quick charge when the system is powered off and trickle charge when the system is powered on. Table 1-7 Time required for quick charges Power Power off Power on Charging time About 2.5 hours Trickle charge
If one of the following occurs, the battery quick-charge process stops: 1. 2. 3. 4. 5. The battery becomes fully charged. The battery is removed. The battery or AC output voltage is abnormal. The charge current is abnormal. The fixed time limit for quick charge is exceeded.
J Trickle Battery Charge
When the main battery is fully charged and the AC power cord is attached, the power supply microprocessor automatically changes from quick charge to trickle charge.
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1.8.3
Backup Battery
The backup battery maintains data for AutoResume. The power source used to back up the AutoResume data is determined according to the following priority: AC power > Main battery > Backup battery The backup battery is charged by the main battery or AC power cord. Table 1-8 shows the charging time and data preservation period of the backup battery. Table 1-8 Backup battery charging/data preservation time Item Charging Time Power On Power Off (with AC power) Power Off (without AC power) Data preservation period (full charge) Time 20 H 20 H Doesn't charge 5H
1.8.4
RTC Battery
The RTC battery provides power to keep the current date, time, and other setup information in memory while the computer is turned off. Table 1-9 shows the charging time and data preservation period of the RTC battery. Table 1-9 RTC battery charging/data preservation time Item Charging Time With AC power or main battery Time 48 H 1 month
Data preservation period (full charge)
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2.1
Troubleshooting
Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) in the computer is causing the computer to malfunction. The FRUs covered are: 1. 2. 3. 4. 5. 6. 7. System Board(s) VGA Board HDD I/F Board Floppy Disk Drive Hard Disk Drive Keyboard Display
The Diagnostics Disk operations are described in Chapter 3 and detailed replacement procedures are given in Chapter 4. The following tools are necessary for implementing the troubleshooting procedures: 1. 2. 3. Diagnostics disk Phillips screwdriver Toshiba MS-DOS system disk(s) (You must install the following onto the disk: SYS.COM, FORMAT.COM, FDISK.COM and FDISK.EXE) 2DD or 2HD formatted work disk for floppy disk drive testing Cleaning kit for floppy disk drive troubleshooting RS-232-C wraparound connector Printer wraparound connector Multimeter External CRT PS/2 or compatible keyboard PS/2 or compatible mouse Serial port wraparound connector PC card wraparound card
4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
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2.2
Troubleshooting Flowchart
Use the flowchart in figure 2-1 as a guide for determining which troubleshooting procedures to execute. Before going through the flowchart steps, do the following: K Verify with the customer that Toshiba MS-DOS is installed on the hard disk. NonToshiba operating systems can cause the computer to malfunction. K Make sure all optional equipment is disconnected from the computer. K Make sure the floppy disk drive is empty.
Figure 2-1 Troubleshooting flowchart (2/2) If the diagnostics program cannot detect an error, the problem may be intermittent. The Running Test program should be executed several times to isolate the problem. Check the Log Utilities function to confirm which diagnostic test detected an error(s), then perform the appropriate troubleshooting procedures as follows: 1. If an error is detected on the system test, memory test, display test, ASYNC test, printer test, or real timer test, perform the system board troubleshooting procedures in section 2.4. If an error is detected on the floppy disk test, perform the floppy disk drive troubleshooting procedures in section 2.5. If an error is detected on the hard disk test, perform the hard disk drive troubleshooting procedures in section 2.6. If an error is detected on the keyboard test, perform the keyboard troubleshooting procedures in section 2.7. If an error is detected on the display test, perform the display troubleshooting procedures in section 2.8. 100CS
2. 3. 4. 5.
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2.3
Power Supply Troubleshooting
The computer's power supply controls many functions and components in the computer. To determine if the power supply is functioning properly, start with Procedure 1 and continue with the other Procedures as instructed. The procedures described in this section are: Procedure 1: Procedure 2: Procedure 3: Procedure 1
AC IN Icon Check Battery Icon Check AC PS Unit Replacement Check
AC IN Icon Check
The AC PS unit converts AC power to DC power and contains a charging circuit which charges the computer's batteries. The AC power cord connects to the AC IN socket connector on the back side of the computer. When the AC power cord is connected to the 100CS, the AC PS unit charges the batteries. The AC IN icon displays whether or not the AC power cord is connected and supplying power. When the AC IN icon is green, the AC power cord is connected and supplying power to the computer. If the AC IN icon does not light, the AC power cord is not supplying power to the computer or the AC power cord is not attached to the computer. Go to Check 1. If the AC IN icon is flashing orange, the AC power cord's voltage supply is abnormal or the power supply is not functioning properly. Go to Check 1. If any of the above indicator conditions are abnormal, make sure the icon lights are not burned out before performing the following checks: Check 1 Make sure the correct AC power cord is firmly plugged into the AC IN socket on the back of the computer. If the AC IN icon flashes orange when the AC power cord is connected, output voltage is abnormal. Connect a new AC power cord and turn the computer on again to verify the indicator condition. The battery pack may be malfunctioning. Replace the battery pack with a new one and turn the computer on again. If the problem still exists, go to Procedure 2.
Check 2
Check 3
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Procedure 2
Battery Icon Check
The Battery icon shows the battery charging status. The Battery icon glows orange when the AC power cord is charging the computer's battery pack. If the Battery icon glows green, the AC power cord is connected and the battery is fully charged. If the Battery icon glows orange, the AC power cord is connected and the battery is being charged. If the Battery icon does not glow, go to Check 1. Check 1 Make sure the AC power cord is firmly plugged into the AC IN socket and wall outlet. If these cables are connected correctly, go to Check 2. Make sure the battery pack is installed in the computer correctly. If the battery pack is installed correctly, go to Check 3. Remove the battery pack and check that the battery terminal is clean and not bent. If the terminal appears dirty, clean it gently with a cotton swab dipped in alcohol. If the terminal looks bent or damaged, replace the system board. If the battery terminal is clean and not bent, go to Check 4. Check 4 Connect a new AC power cord. If the Battery icon still does not glow, go to Check 5. Install a new battery pack. If the Battery icon still does not glow, go to Procedure 3. AC PS Unit Replacement Check
Check 2
Check 3
Check 5
Procedure 3
The system board incorporates the power supply. Power is supplied to the system board through the AC IN plug located on the AC PS unit. The AC PS unit may be damaged, refer to chapter 4 for instructions on how to disassemble the computer, and then perform the following checks: Check 1 Replace the AC PS unit with a new one and restart the system. If the system is still not functioning properly, perform Check 2. Replace the system board with a new one and restart the system. If the problem still exists, other FRUs may be damaged. 100CS
Check 2
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2.4
System Board and HDD I/F Board Troubleshooting
This section describes how to determine if the system board and sound board are defective or not functioning properly. Start with Procedure 1 and continue with the other procedures as instructed. The procedures described in this section are: Procedure 1: Procedure 2: Procedure 3: Procedure 4: Procedure 5: Procedure 1
Message Check Printer Port LED Check on Boot Mode Printer Port LED Check on Resume Mode Diagnostic Test Program Execution Check Replacement Check
Message Check
When the power is turned on, the system performs the Initial Reliability Test (IRT) installed in the BIOS ROM. The IRT tests each IC on the system board and initializes it. K If an error message is shown on the display, perform Check 1. K If there is no error message, go to Procedure 2. K If the Toshiba MS-DOS is properly loaded, go to Procedure 3.
Check 1
If one of the following error messages is displayed on the screen, press the F1 key as the message instructs. These errors occur when the system configuration preserved in the RTC memory (CMOS type memory) is not the same as the actual configuration or when the data is lost. If you press the F1 key as the message instructs, the system configuration in the RTC memory configuration is set to the default setting. If error message (b) appears often when the power is turned on, replace the RTC battery. If any other error message is displayed, perform Check 2. (a) (b) (c) (d) (e) (f) (g) *** Bad HDD type *** Check system. Then press [F1] *** Bad RTC battery *** Check system. Then press [F1] *** Bad configuration *** Check system. Then press [F1] *** Bad memory size *** Check system. Then press [F1] *** Bad time function *** Check system. Then press [F1] *** Bad check sum (CMOS) *** Check system. Then press [F1] *** Bad check sum (ROM) *** Check system. Then press [F1] key ...... key ...... key ...... key ...... key ...... key ...... key ...... 2-7
100CS
Check 2
If the following error message is displayed on the screen, press any key as the message instructs. This error message appears when data stored in RAM under the resume function is lost because the battery has become discharged or the system board is damaged. Go to Procedure 3. WARNING: RESUME FAILURE.
PRESS ANY KEY TO CONTINUE.
If any other message appears, perform Check 3. Check 3 The IRT checks the system board. When the IRT detects an error, the system stops or an error message appears. If one of the following error messages (1) through (19), (20) or (27) is displayed, replace the system board. If error message (20) is displayed, go to the Keyboard Troubleshooting Procedures in section 2.7. If error message (21), (22) or (23) is displayed, go to the HDD Troubleshooting Procedures in section 2.6. If error message (24) or (25) is displayed, go to the FDD Troubleshooting Procedures in section 2.5. (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26) (27) 2-8
BIOS is damaged PIT ERROR MEMORY REFRESH ERROR TIMER CH.2 OUT ERROR FIRST 64KB MEMORY ERROR CMOS CHECKSUM ERROR CMOS BAD BATTERY ERROR FIRST 64KB MEMORY ERROR FIRST 64KB MEMORY PARITY ERROR VRAM ERROR SYSTEM MEMORY ERROR SYSTEM MEMORY PARITY ERROR EXTENDED MEMORY ERROR EXTENDED MEMORY PARITY ERROR DMA PAGE REGISTER ERROR DMAC #1 ERROR DMAC #2 ERROR PIC #1 ERROR PIC #2 ERROR KBC ERROR HDC ERROR HDD #0 ERROR HDD #1 ERROR NO FDD ERROR FDC ERROR TIMER INTERRUPT ERROR RTC UPDATE ERROR 100CS
Procedure 2
Printer Port LED Check on Boot Mode
The printer port LED displays the IRT status and test status by turning lights on and off as an eight-digit binary value for boot mode. Figure 2-2 shows the printer port LED.
Figure 2-2 Printer port LED To use the printer port LED follow these steps: 1. 2. 3. 4. 5. 6. 7. 8. Turn the computer on, then set to boot mode. Turn the computer off. Plug the printer port LED into the computer's parallel port. Hold the space bar down and turn the computer on. Read the LED status from left to right as you are facing the back of the computer. Convert the status from binary to hexadecimal notation. If the final LED status is FFh (normal status), go to Procedure 3. If the final LED status matches any of the test status values in table 2-1, perform Check 1. NOTE: If an error condition is detected by the IRT test, the printer port LED displays an error code after the IRT test ends. For example, when the printer port LED displays 1F and halts, the IRT test has already completed the Display initialization. In this instance, the IRT indicates an error has been detected during the system memory test.
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Table 2-1 Printer port LED boot mode status (1/2) LED status 01H 02H Test item KBC initialization ROM checksum test Special register initialization PIT test PIT initialization PIT function check 03H CMOS check KB initialization 04H 05H 06H Initialization of memory configuration SM-RAM check Self test check Read of Power Supply information 07H 08H 0AH 0BH 0CH 0DH 18H 1FH 25H 30H 40H 41H 42H 4AH 50H 55H 60H 65H 70H 80H 90H A0H ROM/RAM copy Initialization of internal VGA First 64 KB memory test System memory initialization System initialization Interrupt vector initialization PIC initialization Display initialization System memory test Extended memory test DMA page register test DMAC test DMAC initialization PIC test Mouse initialization KBC initialization HDD initialization FDD initialization Printer initialization SIO initialization Timer initialization NDP initialization KBC ERROR HDC ERROR/HDD #0 ERROR FDC ERROR/NO FDD ERROR -- -- RTC UPDATE ERROR TIMER INTERRUPT ERROR -- PIC #X ERROR -- VRAM ERROR SYSTEM MEMORY ERROR SYSTEM MEMORY PARITY ERROR EXTENDED MEMORY ERROR EXTENDED MEMORY PARITY ERROR DMA PAGE REGISTER ERROR DMAC #X ERROR -- PIT ERROR -- MEMORY REFRESH ERROR TIMER CH.2 OUT ERROR CMOS CHECKSUM ERROR CMOS BAD BATTERY ERROR KBC ERROR -- -- -- -- -- -- FIRST 64KB MEMORY ERROR FIRST 64KB MEMORY PARITY ERROR -- -- -- -- BIOS is damaged! ..... Message
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Table 2-1 Printer port LED boot mode status (2/2) LED status A6H C0H FFH FFH Test item Initialization of expansion ROM Password check Setup boot check Boot load Message -- -- *** Bad xxxx xxxx *** Check system. Then press [F1] key. --
Check 1
If the following error codes are displayed, go to Procedure 5. 01h, 02h, 03h, 04h, 05h, 06h, 07h, 08h, 0Ah, 0Bh, 0Ch, 0Dh, 18h, 1Fh, 25h, 30h, 40h, 41h, 42h, 4Ah, 65h, 70h, 80h, 90h, A0h, A6h, C0h, FFh
Check 2
If error code 50h is displayed, go to the Keyboard Troubleshooting procedures in Section 2.7. If error code 55h is displayed, go to the HDD Troubleshooting Procedures in Section 2.6. If error code 60h is displayed, go to the FDD Troubleshooting Procedures in Section 2.5. Printer Port LED Check on Resume Mode
Check 3
Check 4
Procedure 3
The printer port LED displays the IRT status and test status by turning lights on and off as an eight-digit binary value for resume mode. To use the printer port LED follow these steps: 1. 2. 3. 4. 5. 6. 7. 8. Turn the computer on, then set to resume mode. Turn the computer off. Plug the printer port LED into the computer's parallel port. Turn the computer on. Read the LED status from left to right as you face the back of the computer. Convert the status from binary to hexadecimal notation. If the final LED status is FFh (normal status), go to Procedure 4. If the final LED status matches any of the test status values in table 2-2, perform Procedure 5.
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Table 2-2 Printer port LED resume mode error status Error status F1H F2H F5H F6H F7H RAM BIOS error. The system has optional ROM, or optional card (CGA, MDA). Main memory checksum error. Video RAM checksum error. Extended memory checksum error. Meaning of status
Procedure 4
Diagnostic Test Program Execution Check
Execute the following tests from the Diagnostic Test Menu. Refer to chapter 3, Tests and Diagnostics , for more information on how to perform these tests. 1. 2. 3. 4. 5. 6. System test Memory test Printer test ASYNC test Real Timer test PCMCIA test
If an error is detected during these tests, go to Procedure 5 . Procedure 5 Replacement Check
The system board or the HDD I/F board may be damaged. Disassemble the computer following the steps described in chapter 4, Replacement Procedures , and perform the following checks: Check 1 Check 2 Replace the system board with a new one. Refer to chapter 4 for instructions on how to remove and replace the system board. Replace the HDD I/F board with a new one. Refer to chapter 4 for instructions on how to remove and replace the sound board.
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2.5
Floppy Disk Drive Troubleshooting
This section describes how to determine if the 3.5-inch floppy disk drive is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required. Procedure 1: Procedure 2: Procedure 3: Procedure 1
FDD Head Cleaning Check Diagnostic Test Program Execution Check Connector Check and Replacement Check
FDD Head Cleaning Check
FDD head cleaning is one option available in the Diagnostic Program . Detailed operation is given in chapter 3, Tests and Diagnostics . After Toshiba MS-DOS loads, run the Diagnostic Program and then clean the FDD heads using the cleaning kit. If the FDD still does not function properly after cleaning, go to Procedure 2. If the test program cannot be executed on the computer, go to Procedure 3.
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Procedure 2
Diagnostic Test Program Execution Check
The Floppy Disk Drive Diagnostic Test program is stored on the Diagnostics Disk. After loading Toshiba MS-DOS, run the diagnostic program. Refer to Chapter 3, Tests and Diagnostics, for more information about the diagnostics test procedures. Floppy disk drive test error codes and their status names are described in table 2-3. Make sure the floppy disk in the FDD is formatted correctly and that the write protect tab is disabled. If any other errors occur while executing the FDD diagnostics test, go to Check 1. Table 2-3 Floppy disk drive error code and status Code 01h 02h 03h 04h 06h 08h 09h 10h 20h 40h 60h 80h EEh FFh Status Bad command Address mark not found Write protected Record not found Media removed on dual attach card DMA overrun error DMA boundary error CRC error FDC error Seek error FDD not drive Time out error (Not ready) Write buffer error Data compare error
Check 1
If the following message is displayed, disable the write protect tab on the floppy disk. If any other message appears, perform Check 2. Write protected
Check 2
Make sure the floppy disk is formatted correctly. If it is, go to Procedure 3.
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Procedure 3
Connector Check and Replacement Check
The 3.5-inch Floppy Disk Drive is connected to the system board by a flexible cable. This cable may be damaged or disconnected from the 3.5-inch FDD port. Perform the following checks: Check 1 Make sure the flexible cable is firmly connected to the 3.5-inch FDD. FDD PJ5 system board
If this cable is disconnected, connect it to the system unit and repeat Procedure 2. If the FDD is still not functioning properly, perform Check 2. Check 2 The cable may be defective or damaged. Replace the flexible cable. If the FDD is still not functioning properly, perform Check 3. The FDD or its cable may be defective or damaged. Replace the FDD with a new one following the steps in chapter 4, Replacement Procedures . If the FDD is still not functioning properly, perform Check 4. Replace the system board with a new one following the steps in chapter 4.
Check 3
Check 4
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2.6
Hard Disk Drive Troubleshooting
To determine if the hard disk drive is functioning properly, perform the procedures below starting with Procedure 1. Continue with the other procedures as instructed. Procedure 1: Procedure 2: Procedure 3: Procedure 4: Partition Check Message Check Format Check Diagnostic Test Program Execution Check
NOTE: The contents of the hard disk will be erased when the HDD troubleshooting procedures are executed. Transfer the contents of the hard disk to a floppy disk(s) using the BACKUP command in the Toshiba companion utility. Refer to the User's Manual for more information about how to perform the BACKUP. Procedure 1 Partition Check
Insert the Toshiba MS-DOS system disk and turn on the computer. Then perform the following checks: Check 1 Type C: and press Enter. If you cannot change to drive C, go to Check 2. If you can change to drive C, go to Procedure 2. Type FDISK and press Enter. Choose Display Partition Information from the FDISK menu. If drive C is listed, go to Check 3. If drive C is not listed, return to the FDISK menu and choose the option to create a DOS partition on drive C. Then recheck the system. If the problem still exists, go to Procedure 2. If drive C is listed as active in the FDISK menu, go to Check 4. If drive C is not listed as active, return to the FDISK menu and choose the option to set the active partition for drive C. Recheck the system. If the problem still exists, go to Procedure 2. Remove the system disk from the FDD and cold boot the computer. If the problem still exists, go to Procedure 2. Otherwise, the HDD is operating normally.
Check 2
Check 3
Check 4
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Procedure 2
Message Check
When the computer's HDD does not function properly, some of the following error messages may appear on the display. Start with Check 1 below and perform the other checks as instructed. Check 1 If any of the following messages appear, perform Check 2. If the following messages do not appear, perform Check 4: HDC ERROR
(After 5 seconds this message will disappear) or HDD #0 ERROR
(After 5 seconds this message will disappear) or HDD #1 ERROR
(After 5 seconds this message will disappear) Check 2 If either of the following messages appears, perform Procedure 3. If the following messages do not appear, perform Check 3. Insert system disk in drive Press any key when ready .....
or Non-System disk or disk error Replace and press any key
Check 3
Using the Toshiba MS-DOS system disk, install a system program on the hard disk using the SYS command. If the following message appears on the display, the system program has been transferred to the HDD. Restart the computer. If the error message still appears, perform Check 4. System transferred
Check 4
The HDD is connected to the system board directly. This connection can become disconnected or damaged. Disassemble the computer as described in chapter 4, Replacement Procedures . If the HDD is not connected, connect it to the system board and return to Procedure 1. If the HDD is firmly connected to the system board, perform Procedure 3. System Board PJ6 PJ1 HDD I/F PJ7 Board HDD
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Procedure 3
Format Check
The computer's HDD is formatted using the low level format program and the MS-DOS FORMAT program. To format the HDD, start with Check 1 below and perform the other steps as required. Check 1 Using the Toshiba MS-DOS system disk, partition the hard disk using the FDISK command. Format the hard disk using FORMAT C:/S/U to transfer the system program to the HDD. If the following message appears on the display, the HDD is formatted. Format complete
If any other error message appears on the display, refer to the Toshiba MS-DOS Manual for more information and perform Check 2. Check 2 Using the Diagnostic Disk, format the HDD with a low level format option. Refer to Chapter 3, Tests and Diagnostics , for more information about the diagnostic program. If the following message appears on the display, the HDD low level format is complete. Partition and format the HDD using the MS-DOS FORMAT command. Format complete
If you cannot format the HDD using the Test and Diagnostic program, go to Procedure 4.
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Procedure 4
Diagnostic Test Program Execution Check
The HDD test program is stored in the Diagnostics Disk. Perform all of the HDD tests in the Hard Disk Drive Test. Refer to chapter 3, Tests and Diagnostics , for more information about the HDD test program. If an error is detected during the HDD test, an error code and status will be displayed; perform Check 1. The error codes and statuses are described in table 2-4. If an error code is not generated, the HDD is operating properly. Table 2-4 Hard disk drive error code and status Code 01h 02h 04h 05h 07h 08 09h 0Ah 0Bh 10h 11h 20h 40h 80h AAh BBh CCh E0h EEh FFh Status Bad command Bad address mark Record not found HDC not reset Drive not initialized HDC overrun (DRQ) DMA boundary error Bad sector error Bad track error ECC error ECC recover enabled HDC error Seek error Time out error Drive not ready Undefined error Write fault Status error Access time out error Data compare error
Check 1
Replace the HDD unit with a new one following the instructions in chapter 4, Replacement Procedures . If the HDD is still not functioning properly, perform Check 2. Replace the system board with a new one following the instructions in chapter 4.
Check 2
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2.7
Keyboard Troubleshooting
To determine if the computer's keyboard is functioning properly, perform the following procedures. Start with Procedure 1 and continue with the other procedures as instructed. Procedure 1: Procedure 2: Procedure 1
Diagnostic Test Program Execution Check Connector and Replacement Check
Diagnostic Test Program Execution Check
Execute the Keyboard Test in the Diagnostic Program. Refer to chapter 3, nostics, for more information on how to perform the test program.
Tests and Diag-
If an error occurs, go to Procedure 2. If an error does not occur, the keyboard is functioning properly. Procedure 2 Connector and Replacement Check
The keyboard is connected to the system board by a flat cable. This cable may be disconnected or damaged. Disassemble the computer as described in chapter 4, Replacement Procedures , and perform the following checks: Check 1 Make sure the keyboard cable is not damaged and is connected to the system board. Keyboard cable PJ14 System board
If this cable is damaged, replace the keyboard with a new one. If the cable is disconnected, firmly connect it. Perform Procedure 1 again. If the keyboard is still not functioning properly, perform Check 2. Check 2 The keyboard controller on the system board may be damaged. Replace the system board with a new one. Refer to chapter 4 for more information.
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2.8
Display and VGA Board Troubleshooting
This section describes how to determine if the computer's display is functioning properly. Start with Procedure 1 and continue with the other procedures as instructed. Procedure 1: Procedure 2: Procedure 3: Procedure 4: Procedure 5: Procedure 1
Contrast Control Check External CRT Check Diagnostic Test Program Execution Check Connector Check Replacement Check
Contrast Control Check
Contrast is changed by the contrast dial. If the contrast does not change when you turn the contrast dial, perform Procedure 2. Procedure 2 External CRT Check
Connect the external CRT to the computer's external monitor port, then boot the computer. The computer automatically detects the external CRT even if Resume mode is enabled. If the external CRT works correctly, the internal LCD display may be damaged. Go to Procedure 4. If the external CRT appears to have the same problem as the internal LCD, the display controller may be damaged. Go to Procedure 3. Procedure 3 Diagnostic Test Program Execution Check
The Display Test program is stored on the computer Diagnostic Disk. This program checks the display controller on the system board. After loading Toshiba MS-DOS, run the Diagnostic Program. Refer to chapter 3, Tests and Diagnostics , for details. If an error is detected, go to Procedure 4. If an error is not detected, the display is functioning properly.
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Procedure 4
Connector Check
The Display unit has an LCD module, FL, Display switch, and FL inverter board. The FL and FL inverter board are connected by two cables. The LCD module and system board are connected by two signal cables as shown below. Any of these cables may be disconnected. Disassemble the display unit and check the following cable connections. Refer to chapter 4. Replacement Procedures , for more information about how to disassemble the computer.
Figure 2-3 Display connection If any of these cables is not connected, firmly reconnect it and repeat Procedures 1 and 2. If the problem still exists, perform Procedure 5.
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Procedure 5
Replacement Check
The FL, FL inverter board, LCD module, and system board are connected to the display circuits. Any of these components may be damaged. Refer to chapter 4, Replacement Procedures, for instructions on how to disassemble the computer and then perform the following checks: If the FL does not light, perform Check 1. If characters are not displayed clearly, perform Check 3. If some screen functions do not operate properly, perform Check 3. If the FL remains lit when the display is closed, perform Check 4.
Check 1
Replace the FL with a new one and test the display again. If the problem still exists, perform Check 2.
Check 2
Replace the FL inverter board with a new one and test the display again. If the problem still exists, perform Check 3.
Check 3
Replace the LCD module with a new one and test the display again. If the problem still exists, perform Check 4.
Check 4
Replace the display switch with a new one and test the display again. If the problem still exists, perform Check 5.
Check 5
Replace the display cable with a new one and test the display again. If the problem still exists, perform Check 6.
Check 6
The system board may be damaged. Replace the system board with a new one.
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3.1
The Diagnostic Test
This chapter explains how to use the Diagnostic Test program to test the functions of the computer's hardware modules. The Diagnostics Program is stored on the Diagnostic Disk. The Diagnostic Test consists of 11 programs that are grouped into the Service Program Module (DIAGNOSTIC TEST MENU) of the Test Program Module (DIAGNOSTIC TEST). NOTES: To start the diagnostics, follow these steps: 1. Check all cables for loose connections. 2. Exit any application you may be using and close Windows. 3. Be sure the computer is not in virtual 86 mode The test will not run in that mode. If you try to run the test in virtual 86 mode, the following message will be displayed: Cannot execute in a virtual 8086 mode.
If the preceding message is displayed, remove memory managers from your config.sys file. See your MS-DOS documentation for information on the config.sys file. The DIAGNOSTICS MENU consists of the following functions. K DIAGNOSTIC TEST K HARD DISK FORMAT K HEAD CLEANING K LOG UTILITIES K RUNNING TEST K FDD UTILITIES K SYSTEM CONFIGURATION K EXIT TO MS-DOS K SETUP
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The DIAGNOSTIC TEST MENU contains the following functional tests: K SYSTEM TEST K MEMORY TEST K KEYBOARD TEST K DISPLAY TEST K FLOPPY DISK TEST K PRINTER TEST K ASYNC TEST K HARD DISK TEST K REAL TIMER TEST K NDP TEST K EXPANSION TEST
You will need the following equipment to perform some of the computer Diagnostic test programs. K The Diagnostics Disk (All tests) K A formatted working disk for the floppy disk drive test (All tests) K 3.5-inch 2HD/2DD disk for external 3.5-inch FDD K A cleaning kit to clean the floppy disk drive heads (Head Cleaning) K A PCMCIA wraparound connector for the I/O card test (PCMCIA test) K A printer wraparound connector for the printer wraparound test (Printer test) K An RS-232-C wraparound connector for the RS-232-C port wraparound test K K K K K
(ASYNC test) External CRT (All tests) PS/2 or compatible keyboard (All tests) PS/2 or compatible mouse (Keyboard test) Serial port wraparound connector (ASYNC test) Enhanced port replicator (Expansion test)
The following sections detail the tests within the Diagnostic Test function of the DIAGNOSTIC TEST MENU. Refer to Sections 3.15 through 3.23 for detailed information on the remaining Service Program Module functions.
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3.2
Executing the Diagnostic Test
Toshiba MS-DOS is required to run the DIAGNOSTICS PROGRAM. To start the DIAGNOSTIC PROGRAM follow these steps: 1. Insert the Diagnostics disk into the computer's floppy disk drive and turn on the computer. The following menu will appear: TOSHIBA personal computer xxx DIAGNOSTICS version X.XX (c) copyright TOSHIBA Corp. 19XX DIAGNOSTICS MENU : 1 2 3 4 5 6 7 8 9 0 DIAGNOSTIC TEST HARD DISK FORMAT HEAD CLEANING LOG UTILITIES RUNNING TEST FDD UTILITIES SYSTEM CONFIGURATION EXIT TO MS-DOS SETUP
Enter Esc
: : :
Select items Specify Exit
NOTE: To exit the DIAGNOSTIC TEST MENU, press the Esc key. If a test program is in progress, press Ctrl + Break to exit the test program or press Ctrl + C to stop the test program.
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2.
To execute the DIAGNOSTIC TEST MENU from the DIAGNOSTICS MENU, set the highlight bar to 1, and press Enter. The following DIAGNOSTIC TEST MENU will appear: TOSHIBA personal computer xxx DIAGNOSTICS version X.XX (c) copyright TOSHIBA Corp. 19XX DIAGNOSTIC TEST MENU :
1 2 3 4 5 6 7 8 9 10 11 88 99
-
SYSTEM TEST MEMORY TEST KEYBOARD TEST DISPLAY TEST FLOPPY DISK TEST PRINTER TEST ASYNC TEST HARD DISK TEST REAL TIMER TEST NDP TEST EXPANSION TEST ERROR RETRY COUNT SET [HDD & EXIT TO DIAGNOSTICS MENU Enter Esc
FDD] : : : Select items Specify Exit
Refer to sections 3.4 through 3.14 for detailed descriptions of Diagnostic Tests 1 through 11. Function 88 sets the floppy disk drive and hard disk drive error retry count. Function 99 exits the submenus of the Diagnostic Test and returns to the Diagnostic Menu. 3. Select the option you want to execute and press Enter. The following message will appear: SYSTEM TEST XXXXXXX xxx DIAGNOSTIC TEST VX.XX [Ctrl]+[Break]; test end [Ctrl]+[C] ; key stop SUB-TEST : XX PASS COUNT: XXXXX ERROR COUNT: XXXXX WRITE DATA: XX READ DATA : XX ADDRESS : XXXXXX STATUS : XXX SUB-TEST MENU : 01 02 03 04 05 99 - ROM checksum - Thermistor check - Exit to DIAGNOSTIC TEST MENU
Enter Esc
: : :
Select items Specify Exit
NOTE: The menu displayed by your computer may be slightly different from the one shown above. 3-4
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4.
Select the desired subtest number from the subtest menu and press The following message will appear: TEST LOOP : YES
Enter.
Selecting YES increases the pass counter by one each time the test cycle ends and also restarts the test cycle. Selecting NO returns the subtest menu to the main menu after the test is complete. 5. The following message will appear: ERROR STOP : YES
Then, use the left or right arrow keys to move the cursor to the desired option and press Enter. Selecting YES stops the test program when an error is found and displays the operation guide on the right side of the display screen as shown below: ERROR STATUS NAME [[ HALT OPERATION ]] 1: Test end 2: Continue 3: Retry
These three selections have the following functions respectively: 1: 2: 3: Terminates the test program and exits to the subtest menu. Continues the test. Restarts the test from the error.
Selecting NO keeps the test running even if an error is found. 6. Use the arrow keys to move the cursor to the desired option and press Enter.
Table 3-1 in section 3.3 describes the function of each test on the subtest menu. Table 3-2 in section 3.15 describes the error codes and error status for each error.
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3.3
Subtest Names
Table 3-1 lists the subtest names for each test program in the DIAGNOSTIC TEST MENU. Table 3-1 Subtest names (1/2) No. 1 2 Test name SYSTEM MEMORY Subtest No. 01 05 01 02 03 04 05 06 01 02 03 04 01 02 03 04 05 06 07 08 09 10 11 01 02 03 04 05 01 02 03 Subtest item ROM checksum Thermistor check Constant data Address pattern data Refresh Protected mode Memory module Cache memory Pressed key display Pressed keycode display PS/2 Mouse connect check Pointing stick VRAM read/write Character attributes Character set 80x25/30 Character display 320x200 Graphics display 640x200 Graphics display 640x350/480 Graphics display Display page "H" pattern display/Border color LED/DAC pallet Color display Sequential read Sequential read/write Random address/data Write specified address Read specified address Ripple pattern Function Wraparound
3
KEYBOARD
4
DISPLAY
5
FDD
6
PRINTER
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Table 3-1 Subtest names (2/2) No. 7 Test name ASYNC Subtest No. 01 02 03 04 05 01 02 03 04 05 06 07 08 09 10 9 REAL TIMER 01 02 03 01 01 02 Subtest item Wraparound (board) Board (#1) <=> board (#2) (Not Used) Point to point (send) Point to point (receive) Interrupt test Sequential read Address uniqueness Random address/data Cross talk & peak shift Write/read/compare (CE) Write specified address Read specified address ECC circuit Sequential write W-R-C specified address Real time Backup memory Real time carry NDP test PCMCIA wraparound (Internal) PCMCIA wraparound (External)
8
HDD
10 11
NDP EXPANSION
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3.4
System Test
To execute the System Test select 1 from the DIAGNOSTIC TEST MENU, press Enter, and follow the directions displayed on the screen. Move the highlight bar to the subtest you want to execute and press Enter. Subtest 01 ROM checksum The ROM checksum tests the system board from address F0000h to FFFFFh (64KB).
Subtest 02
Not used
Subtest 03
Not used
Subtest 04
Not used
Subtest 05
Thermistor check This subtest checks the thermistor that controls CPU temperature. The thermistor cable connects to PJ1 on the system board.
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3.5
Memory Test
To execute the Memory Test select 2 from the DIAGNOSTIC TEST MENU, press Enter, and follow the directions displayed on the screen. Move the highlight bar to the subtest you want to execute and press Enter. Subtest 01 Constant data (real mode) This subtest writes a 256-byte unit of constant data to conventional memory (0 to 640 KB), then reads the new data and compares the result with the original data. The constant data is FFFFh, AAAAh, 5555h, and 0000h.
Subtest 02
Address pattern data (real mode) This subtest writes address pattern data created by the exclusive-ORing (XORing), to the address segment and address offset in conventional memory (program end to 640 KB), then reads the new data and compares the result with the original data.
Subtest 03
Refresh (real mode) This subtest writes a 256-byte unit of constant data to conventional memory (0 to 640 KB), then reads the new data and compares the result with the original data. The constant data is AAAAh and 5555h. NOTE: There is a short delay between write and read operations, depending on the size of the data.
Subtest 04
Protected mode NOTE: The CONFIG.SYS file must be configured without expanded memory manager programs such as EMM386.EXE, EMM386.SYS, or QEMM386.SYS. Also, the HIMEM.SYS must be deleted from the CONFIG.SYS file. This subtest writes constant data and address data to extended memory (maximum address 100000h), then reads the new data and compares the result with the original data. The constant data is FFh, AAh, 55h, and 00h.
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Subtest 05
Memory module NOTE: To execute this subtest, an optional memory card must be installed in the computer. This subtest functions the same as subtest 04, except it is used for testing an optional memory card. Memory module capacity is 8 MB, 16 MB, and 32 MB. After selecting subtest 05, the following message will appear: Extended memory size (1:8 MB,2:16 MB,3:32 MB)?
Select the number that corresponds to the memory card installed in the computer.
Subtest 06
Cache memory To test the cache memory, a pass-through write-read comparison of `5A' data is run repeatedly to the test area (`7000':'Program' size to `7000':=7FFF' (32 KB)) to check the hit-miss ratio (on/off status). One test takes 3 seconds. Number of misses < Number of hits OK Number of misses Number of hits Fail
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3.6
Keyboard Test
To execute the Keyboard Test, select 3 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The Keyboard test contains four subtests that test the computer's keyboard actions. Move the highlight bar to the subtest you want to execute and press Enter. Subtest 01 Pressed key display (82/84) NOTE: The Num Lock and the Overlay mode must be off to execute this subtest. When you execute this subtest, the keyboard layout is drawn on the display as shown below. When any key is pressed, the corresponding key on the screen changes to an " *" character. Holding a key down enables the auto-repeat function which causes the key's display character to blink. [[[ Press Key Display ]]]
If test OK, Press [Del] [Enter] Key
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Subtest 02
Pressed key code display When a key is pressed, the scan code, character code, and keytop name are displayed on the screen in the format shown below. The Ins, Caps Lock , Num Lock , Scroll Lock , Alt, Ctrl, Left Shift , and Right Shift keys are displayed in reverse screen mode when pressed. The scan codes, character codes, and keytop names are shown in Appendix D. KEYBOARD TEST IN PROGRESS Scan code Character code Keytop 302000 = = =
Ins Lock Caps Lock Num Lock Scroll Lock Alt Ctrl Left Shift Right Shift PRESS [Enter] KEY
Subtest 03
PS/2 mouse connect check NOTE: To execute the PS/2 mouse connect check, a PS/2 mouse must be connected to the enhanced port replicator. This subtest checks whether or not a PS/2 mouse is connected. If this test does not detect an error, it returns to the subtest menu. If this test detects an error, the following message appears: KBD - MOUSE INTERFACE ERROR [[ HALT OPERATION ]] 1: Test end 2: Continue 3: Retry
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Subtest 04
Pointing Stick This subtest checks the functions of the pointing stick as shown below. a) IPS stick pressure sensing direction and parameter. b) IPS switch function check. This test reports the pointing stick motion response from the IPS and IPS switch. When the stick is pressed towards the upper left, the display changes according to the following illustration. If an IPS switch is pressed, the