Acer Travelmate 5620 Service Guide

81Chapter 4
B1h Inform RomPilot about the end of 
POST.
B2h POST done- prepare to boot operating 
system
B4h 1 One short beep before boot
B5h Terminate QuietBoot (optional)
B6h Check password (optional)
B7h Initialize ACPI BIOS
B9h Prepare Boot
BAh Initialize SMBIOS
BBh Initialize PnP Option ROMs
BCh Clear parity checkers
BDh Display MultiBoot menu
BEh Clear screen (optional)
BFh Check virus and backup reminders
C0h Try to boot with INT 19
C1h Initialize POST Error Manager (PEM)
C2h Initialize error...

Chapter 482
E9h Initialize Multi Processor
EAh Initialize OEM special code
EBh Initialize PIC and DMA
ECh Initialize Memory type
EDh Initialize Memory size
EEh Shadow Boot Block
EFh System memory test
F0h Initialize interrupt vectors
F1h Initialize Run Time Clock
F2h Initialize video
F3h Initialize System Management Mode
F4h 1 Output one beep
F5h Clear Huge Segment
F6h Boot to Mini DOS
F7h Boot to Full DOS
CodeBeepsPOST Routine Description 

83Chapter 4
Index of Symptom-to-FRU Error Message
Symptom/ErrorAction in Sequence
LCD backlight doesnt work.
LCD is too dark.
LCD brightness cannot be adjusted.
LCD contrast cannot be adjusted.Enter BIOS Utility to execute “Load Setup Default 
Settings”, then reboot system.
Reconnect the LCD connectors.
Keyboard (if contrast and brightness function key do 
not work).
LCD inverter ID
LCD cable
LCD inverter
LCD
System board
Unreadable LCD screen 
Missing pels in characters
Abnormal screen 
Wrong color...

Chapter 484
Symptom/ErrorAction in Sequence
System cannot detect the 
PC Card (PCMCIA). PCMCIA slot assembly
System board
PCMCIA slot pin is 
damaged.PCMCIA slot assembly
Symptom / ErrorAction in Sequence
Memory count (size) 
appears different from 
actual size.Enter BIOS Setup Utility to execute “Load Default Settings, 
then reboot system.
DIMM
System board
Symptom/ErrorAction in Sequence
In Windows, multimedia 
programs, no sound 
comes from the computer. Audio driver
Speaker
System board
Internal...

85Chapter 4
Note: If you can not correct the problems according to the anterior tables, see “Undetermined Problems”.
Symptom/ErrorAction in Sequence
System configuration 
does not match the 
installed devices. Enter BIOS Setup Utility to execute “Load Default Settings”, 
then reboot system.
Reconnect hard disk/CD-ROM/diskette drives.
External display does not 
work correctly.Press Fn + F5, LCD/CRT/Both display switching
System board
USB does not work 
correctly.System board
Print problems Ensure the...

Chapter 486
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 problems, follow the procedures below:
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...

87Chapter 4
Undetermined Problems
The diagnostic problems does not identify which devices fail, which devices are incorrectly installed, whether a 
short circuit happens, or whether the system is inoperative.
Note: Verify if all devices attached are supported by the computer.
Note: Verify if the power supply used at the time of failure is operating correctly. You can refer to “Power 
System Check”.
Follow the procedures below to isolate the failing FRU. Do not isolate non-defective FRU.
1. Power off the...

Chapter 588
Top View
No.DescriptionNo. Description
1 DC-in jack 2 USB connector
3 CRT connector 4 RJ11 & RJ45 connector
5 MDC module connector 6 MDC board connector
7 Main battery connector 8 ODD connector
9 Mini PCI slot 10 CPU
11 North bridge 12 DIMM slot
13 South bridge 14 HDD connector
15 Line-in jack 16 Microphone-in jack
Jumper and Connector Location
Chapter 5 

89Chapter 5
17 Line-out jack 18 Cardbus controller
19 USB connector 20 LAN controller
21 BIOS ROM 22 RTC battery connector
23 5-in-1 card reader
No.DescriptionNo. Description 

Chapter 590
Bottom View
ItemDescriptionItemDescription
1 Keyboard controller 2 Keyboard connector
3 Lid switch connector 4 System fan connector
5 PCMCIA card reader 6 Function key board connector
7 Touch pad board connector 8 Speaker connector
9 Bluetooth module connector 10 LCD cable connector