Acer Travelmate 520 Service Guide

Chapter 475
Battery can’t be charged Power System Check 
Battery pack
System board
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. Enter BIOS Setup Utility to execute “Load Default 
Settings, then reboot system.
DIMM
System board
Speaker-Related Symptoms...

76Chapter 4
The system doesnt resume from standby mode after 
opening the LCD.Standby Mode
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 to use battery until power off, 
then charge battery).
Battery pack
Charger board
System board
System hangs intermittently. Set Thermal Sensor Threshold. 
Reconnect hard disk/CD-ROM drives. 
Hard disk connection board
System board
Peripheral-Related...

Chapter 477
NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined 
Problems” on page 79. Modem-Related Symptoms
Symptom / ErrorAction in Sequence
Internal modem does not work correctly. System Diagnostics Diskette
Modem phone jack
Modem board
System board 

78Chapter 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...

Chapter 479
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. 
1.
Power-off the...

80Chapter 4
Index of AFlash BIOS Error Message
Error MessageAction in Sequence
Hardware Error  See “System Diagnostic Diskette” on page 40
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 481
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...

82Chapter 4 

Chapter 583
To p  Vi e w
PCB No. 99206
CN1 PS/2 keyboard and Mouse Port CN12 CD-ROM Connector
CN2 External Display Port CN13 PCMCIA Socket Connector
CN3 Parallel Port CN16 Touch Pad Cable Connector
CN4 Serial Port CN18 Hdd Connector
CN5 USB Port 1 CNX1 Diskette Drive Connector
CN6 USB Port 2 CNX2 Keyboard Cable Connector
CN7 Expansion Port CNX3 Digital finger Print Sensor Connector 
(For castor only)
CN8 LED & Inverter Connector CNX4 TV BD Connector
CN9 LCD Connector JK1 Modem / Lan Port
CN10 Cover...

84Chapter 5
SW-6: Check Password
SW6 = OFF, Enable
SW-6 = ON, Disable
SW-7: Boot Block Boot
SW-7 = OFF, Disable
SW-7 = On, Enable SW-4/5
SW-4SW-5
Acer OFF OFF