Acer Travelmate 8531 Service Guide

Chapter 353
5.Remove LCM cable on the back of panel. 

54Chapter 3
Disassembling the External Module
Disassembling the HDD Module
1.Remove HDD bezel and get HDD out of cover. 

Chapter 455
Use the following procedure as a guide for computer problems.
NOTE: The diagnostic tests are intended to test only Acer products. Non-Acer products, prototype cards, or 
modified options can give false errors and invalid system responses.
1.Obtain the failing symptoms in as much detail as possible.
2.Verify the symptoms by attempting to re-create the failure by running the diagnostic test or by repeating 
the same operation.
3.Use the following table with the verified symptom to determine...

56Chapter 4
System Check Procedures
External Diskette Drive Check
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.
1.Boot from the diagnostics diskette and start the diagnostics program.
2.See if FDD Test is passed as the...

Chapter 457
Memory check
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 doagmpstotics program (please refer to main board.
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.
Power System Check
To verify the symptom of the...

58Chapter 4
From Hardware:
1.Power off the computer. 
2.Remove the battery pack and measure the voltage between battery terminals 1(+) and 6(ground). See the 
following figure.
3.If the voltage is still less than 7.5 Vdc after recharging, replace the battery. 
To check the battery charge operation, use a discharged battery pack or a battery pack that has less than 50% 
of the total power remaining when installed in the computer. 
If the battery status indicator does not light up, remove the battery pack...

Chapter 459
Power-On Self-Test (POST) Error Message 
The POST error message index lists the error message and their possible causes. The most likely cause is 
listed first.
NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU 
replacement does not solve the problem, put the original part back in the computer. Do not replace a 
non-defective FRU.
This index can also help you determine the next possible FRU to be replaced when servicing a computer.
If the...

60Chapter 4
Index of Error Messages
Error Code List
Error Message List 
Error CodesError Messages
006 Equipment Configuration Error
Causes:
1. CPU BIOS Update Code Mismatch.
2. IDE Primary Channel Master Drive Error.
(THe causes will be shown before “Equipment 
Configuration Error”)
010 Memory Error at xxxx:xxxx:xxxxh (R:xxxxh, 
W:xxxxh) .
070 Real Time Clock Error.
071 CMOS Battery Bad.
072 CMOS Checksum Error.
110 System disabled.
Incorrect password is specified.
 Battery critical LOW.
In this...

Chapter 461
System battery is dead - Replace and run 
SetupReplace RTC battery and Run BIOS Setup 
Utility to reconfigure system time, then reboot 
system.
System CMOS checksum bad - Default 
configuration usedRTC battery
Run BIOS Setup Utility to reconfigure system 
time, then reboot system.
System timer error RTC battery
Run BIOS Setup Utility to reconfigure system 
time, then reboot system.
System board
Real time clock error RTC battery
Run BIOS Setup Utility to reconfigure system 
time, then reboot...

62Chapter 4
Error Message List
Invalid System Configuration Data BIOS ROM
System board
I/O device IRQ conflict Run “Load Default Settings” in BIOS Setup 
Utility.
RTC battery
System board
Operating system not found Enter Setup and see if fixed disk and drive A 
are properly identified.
Diskette drive
Hard disk drive
System board
No beep Error MessagesFRU/Action in Sequence
No beep, power-on indicator turns off and LCD 
is blank.Power source (battery pack and power 
adapter). See “Power System Check” on...