Acer Travelmate 720 Service Guide

							Chapter 4 83
Diskette Drive Checkout
Do the following to isolate the problem to a controller, driver, or diskette. A 
write-enabled, diagnostic diskette is required.
Note: 
Make sure that the diskette does not have more than one label 
attached to it. Multiple labels can cause damage to the drive or 
cause the drive to fail. 
Do the following to select the test device. See “Running the Diagnostics” for 
details.
1.  Boot from the diagnostics diskette and start the PQA program (please 
refer to “Running PQA Diagnostics Program”).
2.  Go to the diagnostic Diskette Drive in the test items.
3.  Press F2 in the test items.
4.  Follow the instructions in the message window.
If an error occurs with the internal diskette drive, reseat the connector on the 
System board.
If the error still remains:
1.  Reseat the diskette drive.
2.  Replace the diskette driver cable.
3.  Replace the diskette.
4.  Replace the IDE board
5.  Replace the System board.
CD-ROM Driver Test
Do the following to isolate the problem to a controller, drive, or CD-ROM. 
Make sure that the CD-ROM does not have any label attached to it. The label 
can cause damage to the drive or can cause the drive to fail.
Do the following to select the test device:
1.  Boot from the diagnostics diskette and start the PQA program (please 
refer to “Running PQA Diagnostics Program”.
2.  Go to the diagnostic CD-ROM in the test items.
3.  Press F2 in the test items.
4.  Follow the instructions in the message window.
If an error occurs, reseat the connector on the System board. If the error still 
remains:
1.  Reseat the CD-ROM drive.
2.  Replace the CD-ROM drive.
3.  Replace the IDE board.
4.  Replace the System board.
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							84 Troubleshooting
Keyboard or Auxiliary Input Device Checkout
Remove the external keyboard if the internal keyboard is to be tested.
If the internal keyboard does not work or an unexpected character appears, 
make sure that the flexible cable extending from the keyboard is correctly 
seated in the connector on the sub card.
If the keyboard cable connection is correct, run the Keyboard Test. See 
“Running the Diagnostics” for details.
If the tests detect a keyboard problem, do the following one at a time to 
correct the problem. (Do not replace a nondefective FRU):
1.  Reseat the keyboard cables.
2.  Replace the keyboard.
3.  Replace the System board.
The following auxiliary input devices are supported for this computer:
TNumeric keypad
TExternal keyboard (with keyboard/mouse cable)
If any of these devices do not work, reseat the cable connector and repeat 
the failing operation.
If the problem does not recur, recheck the connector. If the problem is not 
corrected, replace the device and then the System board.
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							Chapter 4 85
Memory Checkout
DIMM cards are available for increasing memory capacity.
Memory errors might stop system operations, show error messages on the 
screen, or hang the system.
1.  Boot from the diagnostics diskette and start the PQA program (please 
refer to “Running PQA Diagnostics Program”).
2.  Go to the diagnostic Memory in the test items.
3.  Press F2 in the test items.
4.  Follow the instructions in the message window.
Note: 
Make sure that the DIMM is fully installed into the connector. A 
loose connection can cause an error.
Slot 1 (MB)Slot 2 (MB)Total Memory (MB)
32 0 32
83240
32 8 40
16 32 48
32 16 48
32 32 64
64 0 64
86472
64 8 72
16 64 80
64 16 80
32 64 96
64 32 96
64 64 128
64 128 160
128 128 256
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							86 Troubleshooting
Flash Memory Update:
The flash memory update is required for the following conditions:
TNew versions of system programs
TNew features or options
Power System Checkout
To verify the symptom of the problem, power on the computer using each of 
the following power sources:
1.  Remove the battery pack and diskette drive.
2.  Connect the AC Adapter and check that power is supplied.
3.  Disconnect the AC Adapter and install the charged battery pack; then 
check that power is supplied by the battery pack.
If you suspect a power problem, see the appropriate power supply checkout 
in the following list:
T“Checking the AC Adapter”
T“Checking Operational Charging”
T“Checking the Battery Pack”
Checking the AC Adapter:
TIf the power problem occurs only when the port replicator is used, 
replace the port replicator.
TIf the power-on indicator does not turn on, check the power cord of the 
AC Adapter for correct continuity and installation.
TIf the operational charge does not work, go to “Checking Operational 
Charging.”
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							Chapter 4 87
Checking Operational Charging: 
To check operational charging, use a discharged battery pack or a battery 
pack that has less than 50% of the total power remaining when installed in 
the computer.
Perform operational charging. If the battery status indicator does not turn on, 
remove the battery pack and let it return to room temperature. Reinstall the 
battery pack.
If the charge indicator still does not turn on, replace the battery pack. If the 
charge indicator still does not turn on, replace the System board. Then 
reinstall the battery pack. If the reinstalled battery pack is not charged, go to 
the next section.
Checking the Battery Pack: 
Battery charging will not start until the Fuel-Gauge shows that less than 95% 
of the total power remains; with this condition the battery pack can charge to 
100% of its capacity. This protects the battery pack from being overcharged 
or having a shortened life. 
Do the following:
1.  Power off the computer.
2.  Remove the battery pack and measure the voltage between battery 
terminals 1 (+) and 7. See the following figure:
If the voltage is still less than +10.0 Vdc after recharging, replace the battery.
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							88 Troubleshooting
TouchPad Checkout
If the TouchPad does not work, check the configuration in the BIOS program. 
If the configuration of the TouchPad is disabled, select Enable to enable it.
If this does not correct the TouchPad problem, continue with the following. 
After you use the TouchPad, the pointer drifts on the screen for a short time. 
This self-acting pointer movement can occur when a slight, steady pressure 
is applied to the TouchPad pointer. This symptom is not a hardware problem. 
No service actions are necessary if the pointer movement stops in a short 
period of time.
If a click button problem or the pointing stick problem occurs, do the following:
1.  Boot from the diagnostics diskette and start the PQA program (please 
refer to “Running PQA Diagnostics Program”).
2.  Go to the diagnostic Pointing Dev. in the test items.
3.  Press F2 in the test items.
4.  Follow the instructions in the message window.
If either the pointing stick or the click button do not work, do the following 
actions one at a time to correct the problem do not replace a nondefective 
FRU:
1.  Reseat the TouchPad cables.
2.  Replace the TouchPad cables.
3.  Replace the TouchPad.
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							Chapter 4 89
Symptom-to-FRU Index
The symptom-to-FRU index lists the symptoms and errors and their possible 
causes. The most likely cause is listed first.
Note: 
Perform the FRU replacement or actions in the sequence shown 
in the “FRU/Action” columns. If a FRU replacement did not solve 
the problem, put the original part back in the computer. Do not 
replace a nondefective FRU.
This index can also help you determine the next possible FRU to be replaced 
when servicing a computer.
Numeric error codes show the errors detected in POST or system operation. 
If no codes are available, use narrative symptoms.
If the symptom is not listed, go to “Undetermined Problems”.
Numeric Error Codes
The following is a list of the messages that the BIOS can display. Most of 
them occur during POST. Some of them display information about a hardware 
device, e.g., the amount of memory installed. Others may indicate a problem 
with a device, such as the way it has been configured. Following the list are 
explanations of the messages and remedies for the reported problems.
Note: 
If the system fails after you make changes in the Setup menus, 
reset the computer, enter Setup and install Setup defaults or 
correct the error.
Symptom / ErrorFRU / Action in Sequence
0200
Failure Fixed Disk1.  Reseat Hard disk driver.
2. “Load Setup Defaults” in BIOS Setup Utility.
3. Hard disk driver
4. System board
0211
Stuck KeyGo to “Keyboard or Auxiliary Input Device 
Checkout”.
0211
Keyboard errorGo to “Keyboard or Auxiliary Input Device 
Checkout”.
0212
Keyboard Controller FailedGo to “Keyboard or Auxiliary Input Device 
Checkout”.
0213
Keyboard locked - Unlock 
key switchUnlock external keyboard
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							90 Troubleshooting
0220
Monitor type does not 
match CMOS - Run SetupRun “Load Setup Defaults” in BIOS Setup Utility.
0230
Shadow RAM Failed at 
offset: nnnn1. BIOS ROM
2. System board
0231
System RAM Failed at 
offset: nnnn1. DIMM
2. System board
0232
Extended RAM Failed at 
offset:nnnn1. DIMM
2. System board
0250
System battery is dead - 
Replace and run SetupReplace backup battery (RTC) and Run SETUP 
to reconfigure System time, then reboot system.
0251
System CMOS checksum 
bad - Default configuration 
used1. Backup battery (RTC)
2. Run SETUP to reconfigure System, then reboot 
    system.
0260
System timer error1. Backup battery (RTC)
2. Run SETUP to reconfigure System, then reboot 
    system.
3. System board
0270
Real time clock error1. Backup battery (RTC)
2. Run SETUP to reconfigure System, then reboot 
    system.
3. System board
0280
Previous boot incomplete - 
Default configuration used1. Run “Load Setup Defaults” in BIOS Setup 
     Utility.
2. Backup battery (RTC)
3. System board
0281
Memory size found by 
POST differed from CMOS1. Run “Load Setup Defaults” in BIOS Setup 
     Utility.
2. DIMM
3. System board
02B0
Diskette driver A error1. Check that the drive is defined with the proper 
     diskette type in Setup.
2. Go to “Diskette Drive Checkout”.
02B2
Incorrect Drive A type - run 
SETUP1. Check that the drive is defined with the proper 
     diskette type in Setup.
2. Go to “Diskette Drive Checkout”.
Symptom / ErrorFRU / Action in Sequence
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							Chapter 4 91
02D0
System cache error - Cache 
disabled1. IMM (CPU board)
2. System board
02F0
CPU ID:1. IMM (CPU board)
2. System board
02F5
DMA Test Failed1. DIMM
2. IMM (CPU board)
3. System board
02F6
Software NMI Failed1. DIMM
2. IMM (CPU board)
3. System board
02F7
Fail-Safe Timer NMI Failed1. DIMM
2. IMM (CPU board)
3. System board
Device Address Conflict 1. Run “Load Setup Defaults” in BIOS Setup 
     Utility.
2. Backup battery (RTC)
3. System board
Allocation Error for: device 1. Run “Load Setup Defaults” in BIOS Setup 
     Utility.
2. Backup battery (RTC)
3. System board
Failing Bits: nnnn 1. DIMM
2. BIOS ROM
3. System board
Fixed Disk n None
Invalid System 
Configuration Data1. BIOS ROM
2. System board
I/O device IRQ conflict 1. Run “Load Setup Defaults” in BIOS Setup 
     Utility.
2. Backup battery (RTC)
3. System board
Operating system not found 1. Enter Setup and see if fixed disk and drive A: 
     are properly identified.
2. Diskette Driver
3. Hard Disk
4. System board
Symptom / ErrorFRU / Action in Sequence
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							92 Troubleshooting
Power-on indicator on, and 
a blank LCD not POST1. Ensure every connection is correct.
2. DIMM
3. Reseat IMM (CPU board)
4. IMM (CPU board)
5. System board
Power-on indicator not on, 
and a blank LCD during 
POST1. Reseat LCD connectors.
2. LCD inverter ID
3. LCD FPC cable
4. LCD inverter
5. LCD
6. LED board
7. System board
Power-on indicator on, and 
a blank LCD during POST.1. Reseat the LCD connectors.
2. LCD inverter ID
3. LCD FPC Cable
4. LCD inverter
5. LCD
6. System board
•  LCD backlight not working
•  LCD too dark
•  LCD brightness can not be 
adjusted
•  LCD contrast cannot be 
adjusted1.  Reseat the LCD connectors.
2.  Keyboard (if control is from the keyboard)
3.  LCD inverter ID
4.  LCD FPC Cable
5.  LCD inverter
6.  LCD
7.  System board
•  LCD screen unreadable
•  Characters missing pels
•  Screen abnormal
•  Wrong color displayed1.  Reseat the LCD connectors.
2.  LCD inverter ID
3.  LCD FPC Cable
4.  LCD inverter
5.  LCD
6.  System board
LCD has extra horizontal or 
vertical lines displayed.1.  LCD inverter ID
2.  LCD inverter
3.  LCD FPC Cable
4.  LCD
5.  System board
Keyboard (one or more keys) 
does not work.1.  Reseat the keyboard cable.
2.  Keyboard
3.  System board
TouchPad does not work. 1.  Reseat TouchPad cable.
2.  TouchPad board
3.  System board
Symptom / ErrorFRU / Action in Sequence
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