Acer Travelmate 8531 Service Guide

Chapter 463
InsydeH2O BIOS Beep Codes
CodeBeepsPOST Routine Description
02h Verify Real Mode
03h Disable Non-Maskable Interrupt (NMI)
04h Get CPU type
06h Initialize system hardware
08h Initialize chipset with initial POST values
09h Set IN POST flag
0Ah Initialize CPU registers
0Bh Enable CPU cache
0Ch Initialize caches to initial POST values
0Eh Initialize I/O component
0Fh Initialize the local bus IDE
10h Initialize Power Management
11h Load alternate registers with initial POST values
12h Restore CPU...

64Chapter 4
45h POST device initialization
46h 2-1-2-3 Check ROM copyright notice
48h Check video configuration against CMOS
49h Initialize PCI bus and devices
4Ah Initialize all video adapters in system
4Bh QuietBoot start (optional)
4Ch Shadow video BIOS ROM
4Eh Display BIOS copyright notice
50h Display CPU type and speed
51h Initialize EISA board
52h Test keyboard
54h Set key click if enabled
58h 2-2-3-1 Test for unexpected interrupts
59h Initialize POST display service
5Ah Display prompt “Press F2 to...

Chapter 465
8Ah Initialize Extended BIOS Data Area
8Bh Test and initialize PS/2 mouse
8Ch Initialize floppy controller
8Fh Determine number of ATA drives (optional)
90h Initialize hard-disk controllers
91h Initialize local-bus hard-disk controllers
92h Jump to UserPatch2
93h Build MPTABLE for multi-processor boards
95h Install CD ROM for boot
96h Clear huge ES segment register
97h Fixup Multi Processor table
98h 1-2 Search for option ROMs. One long, two short beeps on 
checksum failure.
99h Check for...

66Chapter 4
C5h PnPnd dual CMOS (optional)
C6h Initialize notebook docking (optional)
C7h Initialize notebook docking late
C8h Force check (optional)
C9h Extended checksum (optional)
D2h Unknown interrupt
E0h Initialize the chipset
E1h Initialize the bridge
E2h Initialize the CPU
E3h Initialize the system timer
E4h Initialize system I/O
E5h Check force recovery boot
E6h Checksum BIOS ROM
E7h Go to BIOS
E8h Set Huge Segment
E9h Initialize Multi Processor
EAh Initialize OEM special code
EBh Initialize PIC...

Chapter 467
Index of Symptom-to-FRU Error Message
LCD-Related Symptoms
Indicator-Related Symptoms
Power-Related Symptoms
Symptom / ErrorAction in Sequence
LCD backlight doesnt work
LCD is too dark
LCD brightness cannot be adjusted
LCD contrast cannot be adjustedEnter BIOS Utility to execute “Load Setup 
Default Settings”, then reboot system.
Reconnect the LCD connectors.
Keyboard (if contrast and brightness function 
key doesnt work).
LCD inverter ID
LCD cable
LCD inverter
LCD
System board
Unreadable LCD...

68Chapter 4
PCMCIA-Related Symptoms
Memory-Related Symptoms
Speaker-Related Symptoms
Power Management-Related Symptoms
The system doesn’t power-off. Power source (battery pack and power 
adapter). See “Power System Check” on page 
57. 
Hold and press the power switch for more than 
4 seconds.  
System board
Battery can’t be charged. See “Check the Battery Pack” on page 57. 
Battery pack
System board
Symptom / ErrorAction in Sequence
System cannot detect the PC Card (PCMCIA).  PCMCIA slot assembly
System...

Chapter 469
Peripheral-Related Symptoms
Keyboard/Touchpad-Related Symptoms
The system doesnt resume from hibernation 
mode.Hard disk connection board
Hard disk drive
System board
The system doesnt resume from standby 
mode after opening the LCD.LCD cover switch
System board
Battery fuel gauge in Windows doesn’t go 
higher than 90%. Remove battery pack and let it cool for 2 
hours.
Refresh battery (continue use battery until 
power off, then charge battery).
Battery pack
System board
System hangs...

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Modem-Related Symptoms
NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined 
Problems” on page 72. Touchpad does not work. Reconnect touchpad cable.
Touchpad board
System board
Symptom / ErrorAction in Sequence
Internal modem does not work correctly. Modem phone port
modem combo board
System board
Symptom / ErrorAction in Sequence 

Chapter 471
Intermittent Problems
Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a 
hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement 
should be considered only when a recurring problem exists.
When analyzing an intermittent problem, do the following:
1.Run the advanced diagnostic test for the system board in loop mode at least 10 times.
2.If no error is detected, do not replace any FRU.
3.If any...

72Chapter 4
Undetermined Problems
The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect, 
whether a short circuit is suspected, or whether the system is inoperative.  
Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).
NOTE: Verify that all attached devices are supported by the computer.
NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power 
System Check” on...