Acer Extensa 500 Service Guide

Chapter 481
No beep, power-on 
indicator turns on and LCD 
is blank.Power source (battery pack and power adapter). 
See “Power System Check” on page 75. 
Reconnect the LCD connector
DC-DC/charger board
CPU board. 
Hard disk drive
LCD inverter ID
LCD FPC cable
Inverter
LCD
System board
No beep, power-on 
indicator turns on and LCD 
is blank.  But you can see 
POST on an external CRT. Reconnect the LCD connectors.
LCD inverter ID
LCD FPC cable 
LCD inverter
LCD
System board
No beep, power-on 
indicator...

82
Troubleshooting 
Unreadable LCD screen 
Missing pels in characters
Abnormal screen 
Wrong color displayedReconnect the LCD connector
LCD inverter ID
LCD FPC Cable
LCD inverter
LCD
System board
LCD has extra horizontal or 
vertical lines displayed.LCD inverter ID
LCD inverter
LCD FPC Cable
LCD
System board
Indicator-Related Symptoms
Symptom / ErrorAction in Sequence
Indicator incorrectly remains 
off or on, but system runs 
correctlyReconnect the LED board
LED board
System board
Power-Related Symptoms...

Chapter 483
The system doesn’t power-
off.Power source (battery pack and power adapter). 
See “Power System Check” on page 75. 
Hold and press the power switch for more than 4 
seconds.  
Charger board
System board
Battery can’t be charged See “Check the Battery Pack” on page 76. 
Battery pack
DC-DC/charger board
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...

84
Troubleshooting 
Power Management-Related Symptoms
Symptom / ErrorAction in Sequence
The system will not enter 
hibernationKeyboard (if control is from the keyboard)
Hard disk drive
System board
The system doesnt enter 
hibernation mode and four 
short beeps every minute.See “Hibernation Mode” on page 31.
Ensure the “Heuristic Power Management Mode” 
in the Power Management of BIOS Setup Utility is 
not set to [OFF].
Press Fn+F4 and see if the computer enters 
hibernation mode.
Touchpad
Keyboard
Hard...

Chapter 485
Peripheral-Related Symptoms
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
See “Running PQA Diagnostics Program.” on 
page 45. 
System board
USB does not work 
correctlySee “System Diagnostic Diskette” on page 44
System board
Print...

86
Troubleshooting 
Note: If you cannot find a symptom or an error in this list and the 
problem remains, see “Undetermined Problems”.
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...

Chapter 487
qPrinter, mouse, and other external devices
qBattery pack
qHard disk drive
qDIMM 
qCD-ROM
qDiskette drive
qPC 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:
qSystem board
qLCD assembly
qCPU card 

88
Troubleshooting  

Chapter 589
To p  Vi e w
CN11 Power Switch CN16 CD-ROM Connector
CN9 LCD Connector CN15 FDD Connector
CN14 CPU Connectors CN13 PCMCIA Socket
CN17 Fan Connector (reserved) CN12 Golden Finger for Debug 
Board
CN18 HDD Connector CN7 LCD Cover Switch Connector
CN20 Keyboard Connector CN8 Internal Microphone 
Connector
CN19 Touchpad Connector CN10 LED Board Connector
SW1 See Next Page JK1 AC Adapter Connector 
SW2 See Next Page CN3 PS/2 Port
CN2 Serial Port CN1 Parallel Port
CN6 Port Replicator CN4 Video...

90
Connectors and Jumpers 
BottoM View
SW1 Settings
SW1Setting
Switch 1, Switch 2 Default at OFF setting, un-configurable.
SW2 Settings
SW2Setting
Switch 1 ON: OEM BIOS
OFF: Acer BIOS
Switch 2 ON: Bypass password
OFF: Check password
Switch 3, Switch 4 OFF, OFF: US keyboard
OFF, ON: European keyboard
ON, OFF: Japanese keyboard
SM1 Modem Socket
CN23, CN24 Charger Connector
CN21 DIMM Socket 2
CN22 DIMM Socket 1