Acer Travelmate 550 Service Guide

							Chapter 473
Index of Symptom-to-FRU Error Message
LCD-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 Defaults” on Exit screen, 
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 screen 
Missing pels in characters
Abnormal screen 
Wrong color displayedReconnect the LCD connector
LCD inverter ID
LCD cable
LCD inverter
LCD
System board
LCD has extra horizontal or vertical lines 
displayed.LCD inverter ID
LCD inverter
LCD cable
LCD
System board
Indicator-Related Symptoms
Symptom / ErrorAction in Sequence
Indicator incorrectly remains off or on, but system 
runs correctlyReconnect the inverter board
Inverter board
System board
Power-Related Symptoms
Symptom / ErrorAction in Sequence
Power shuts down during operation Power source (battery pack and power adapter). See “Power 
System Check” on page 67. 
Battery pack
Power adapter
Hard drive & battery connection board
System board
The system doesn’t power-on. Power source (battery pack and power adapter). See “Power 
System Check” on page 67.
Battery pack
Power adapter
Hard drive & battery connection board
System board
The system doesn’t power-off. Power source (battery pack and power adapter). See “Power 
System Check” on page 67. 
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 68. 
Battery pack
System board 
						

							74Chapter 4
PCMCIA-Related Symptoms
Symptom / ErrorAction in Sequence
System cannot detect the PC Card (PCMCIA)  PCMCIA slot assembly
System board
PCMCIA slot pin is damaged. PCMCIA slot assembly
Memory-Related Symptoms
Symptom / ErrorAction in Sequence
Memory count (size) appears different from 
actual size.DIMM
System board
Speaker-Related Symptoms
Symptom / ErrorAction in Sequence
In Windows, multimedia programs, no sound 
comes from the computer. Audio driver
Speaker
System board
Internal speakers make noise or emit no sound. Speaker
System board
Power Management-Related Symptoms
Symptom / ErrorAction in Sequence
The system will not enter hibernation Keyboard (if control is from the keyboard)
Hard disk drive
System board
The system doesnt enter hibernation mode and 
four short beeps every minute.Press Fn+F4 and see if the computer enters hibernation mode.
Touchpad
Keyboard
Hard disk connection board
Hard disk drive
System board
The system doesn’t enter standby mode after 
closing the LCDLCD cover switch
System board
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 intermittently. See “Thermal & Fan Utility” on page 45. 
Reconnect hard disk/CD-ROM drives. 
Hard disk connection board
System board 
						

							Chapter 475
NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined 
Problems” on page 77. Peripheral-Related Symptoms
Symptom / ErrorAction in Sequence
System configuration does not match the 
installed devices. Enter BIOS Setup Utility to execute “Load Setup defaults”, then 
reboot system.
Reconnect hard disk/CD-ROM/diskette drives.
External display does not work correctly. Press Fn+F5, LCD/CRT/Both display switching
See “System Diagnostic Diskette” on page 45. 
System board
USB does not work correctly See “System Diagnostic Diskette” on page 45
System board
Print problems. Ensure the “Parallel Port” in the “System Devices” of BIOS Setup 
Utility is set to Enabled.
Onboard Devices Configuration
Run printer self-test.
Printer driver
Printer cable
Printer
System Board
Keyboard/Touchpad-Related Symptoms
Symptom / ErrorAction in Sequence
Keyboard (one or more keys) does not work. Reconnect the keyboard cable.
Keyboard
System board
Touchpad does not work. Reconnect touchpad cable.
Touchpad board
System board
Modem-Related Symptoms
Symptom / ErrorAction in Sequence
Internal modem does not work correctly. See “System Diagnostic Diskette” on page 45.
Modem phone port
modem combo board
System board 
						

							76Chapter 4
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 error is detected, replace the FRU.  Rerun the test to verify that there are no more errors.  
						

							Chapter 477
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 page 67):
1.Power-off the computer.
2.Visually check them for damage. If any problems are found, replace the FRU.
3.Remove or disconnect all of the following devices:
❑Non-Acer devices
❑Printer, mouse, and other external devices
❑Battery pack
❑Hard disk drive
❑DIMM 
❑CD-ROM/Diskette drive Module
❑PC Cards
4.Power-on the computer.
5.Determine if the problem has changed.
6.If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7.If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU:
❑System board
❑LCD assembly 
						

							78Chapter 4
Index of AFlash BIOS Error Message
Error MessageAction in Sequence
Hardware Error  See “System Diagnostic Diskette” on page 45
VPD Checksum Error Reboot the system and then restest with this diskette.
BIOS Update Program Error Turn off the power and restart the system.
System Error Make sure this AFlash BIOS diskette for this model.
Without AC adapter make sure to connect AC adapter
Battery Low make sure to install a highly charged battery, and reboot 
system. 
						

							Chapter 479
Index of PQA Diagnostic Error Code, Message
Error CodeMessageAction in Sequence
16XXX Backup battery error Backup battery
01XXX CPU or main board error Reload BIOS default setting.
System board
02XXX Memory error DIMM
System board
03XXX Keyboard error Reset Keyboard
Keyboard
System board
04XXX Video error System board
05XXX Parallel Port error System board
06XXX Serial port or main board error System board
07XXX Diskette drive error Diskette drive
System board
08XXX Hard disk error Reload BIOS default setting
Hard disk
System board
09XXX CD-ROM error Reset CD-ROM cable
CD-ROM drive
System board
10XXX Co-processor error System board
11XXX Pointing device error Reset Keyboard
Keyboard
System board
12XXX Cache test error System board 
						

							80Chapter 4 
						

							Chapter 581
To p  V i e w
PCB 01200-S
SW2 POWER.-BTN
JP2 LCD
SW2 Power On/Off button JP1 It is software debug only, normally 
shiping on this connector
JP2 LCD connector JP7 FDD connector
SW1 LID switch JP6 Internal keyboard connector
JP3 System Board connector JP4 Switch board connector
PIN NOSignalPIN NOSignal
1. ON/OFF BTN# 2. ON/OFF BTN#
3. GND 4. GND
PIN NOSignalPIN NOSignal
1. +5VALW 2. GND
3. +5VALW 4. GND
5. NC 6. NC
7. 20 INVT_PWN 8. DISPOFF#
9. +5VALW 10. LCDDVDD
Jumper and Connector Locations
Chapter 5 
						

							82Chapter 5
SW1 LID-SW
JP3 HEADERX.PRT
JP1 DEBUG-9.PRT
11. +5VALW 12. LCDVDD
13. +3VS 14. LCDDVGA
15. +3VS 16. LCDDVGA
17. GND 18. GND
19. NC 20. L LCD0
21. GND 22. L LCD1
23. PID0 24. GND
25. PID1 26. L LCD2
27. PID2 28. L LCD3
29. PID3 30. GDN
31. ENVDD 32. L LCD4
33. DISPOFF# 34. L LCD5
35. L LCD15 36. GDN
37. L LCD14 38. L LCD6
39. GND 40. L LCD7
41. L LCD13 42. GDN
43. L LCD12 44. L LCD8
45. GND 46. L LCD9
47. L LCD11 48. GDN
49. L LCD10 50. NC
PIN NOSignalPIN NOSignal
1. GND 2. GND
3. LID_SW# 4. LID_SW#
PIN NOSignalPIN NOSignal
1. +5VALW 2. ACIN
3. HDD_LED# 4. CD_FDD_LED#
5. CAPS_LED# 6. ARROW_LED#
7. NUM_LED# 8. GND
9. +5VS 10. +3VS
PIN NOSignalPIN NOSignal
1. +5V 2. GND
3. RXD0F# 4. TXD0F#
5. DSR0F 6. RTS0F
7. CTS0F 8. DTR0F
9. RI0F 10. D0F
PIN NOSignalPIN NOSignal