Acer Travelmate 4520 Service Guide

Chapter 361
2.Release the WLAN antennas from the left and right LCD brackets.
3.Remove the LCD panel from its chassis.  
Removing the LCD-CCD Cable      
1.Peel off the LCD-CCD cable from the bottom edge of the LCD panel.
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62Chapter 3
2.Detach the adhesive tab on the cables’s LCD connector, then disconnect the cable from the LCD 
panel PCB.
Removing the LCD Panel Brackets      
TRemove the screws securing the LCD panel brackets.
StepPart Number and Type QuantityColorTo r q u e
*M2 x L3 BZN+NYLOK8 Silver1.6 kgf-cm +/-15% 
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Chapter 363
Removing the Internal Microphone and the CCD Board              
1.Peel off the aluminum foil tabs and acetic tape securing the microphone cable.
2.Carefully remove the internal microphone from the LCD chassis.
3.Remove the CCD board from the LCD chassis. 
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64Chapter 3
Removing the WLAN Antennas    
1.Peel off the aluminum foil tabs securing the WLAN antennas.
2.Carefully detach the WLAN antenna from the LCD chassis. 
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Chapter 465
This chapter provides instructions on how to troubleshoot system hardware problems. If the problem can’t be 
resolved using the procedures described here, information for getting online technical assistance is also 
provided. 
Hardware Diagnostic Procedure
IMPORTANT:  The diagnostic tests described in this chapter are only intended to test Acer products. Non-Acer 
products, prototype cards, or modified options can give false errors and invalid system 
responses.
1.Obtain as much detail as...

66Chapter 4
System Check Procedures
External Diskette Drive Check
Do the following to isolate the problem to a controller, driver, or diskette. A write-enabled, diagnostic diskette is 
required.
IMPORTANT:  Make sure that the diskette does not have more than one label attached to it. Multiple labels 
can damage to the drive. 
1.Boot from the diagnostics diskette and start the diagnostics program.
2.Check if the FDD Test is successful (pass).
3.Follow the instructions in the message window.
If an error...

Chapter 467
Memory Check
Memory errors might stop system operations, display error messages, or cause the system to hang up.
Make sure that the DIMM is properly installed in its slot. A loose connection can cause an error.
If the DIMM connection is correct, run the Doagmpstotics Test. 
1.Boot from the diagnostics diskette and start the Doagmpstotics program.
2.Go to the diagnostic memory in the test items.
3.Press F2 in the test items.
4.Follow the instructions in the message window.
Power System Check...

68Chapter 4
Check the Battery Pack  
Check the battery pack via the OS control and by checking the actual battery pack. 
Using the OS control:
1.Open the Power Management setting in the Windows Control Panel
 screen. 
2.On the Power Meter
 tab, confirm that the Current Power Source and Total Battery Power Remaining 
parameters are correct.
3.Repeat steps 1 and 2 using both the battery pack and the AC adapter as the power source.
This will help you identify if the problem is on recharging or discharging....

Chapter 469
POST Error Indicators
When POST detects a system failure, it either displays a POST error message, or emits a series of beep 
codes. 
POST Error Message
Whenever a non-fatal error occurs during POST, an error message describing the problem appears onscreen. 
These text messages are displayed in normal video (white text on black background). It shows the details of 
the error.
The POST error message index in this section lists the error messages and their possible causes. The most 
likely...

70Chapter 4
Error Message List
Error MessageFRU/Action in Sequence
Failure Fixed Disk Reconnect the hard disk drive to its connector.
Run the Setup Utility, then press F9 to load the system 
defaults.
Hard disk drive
System board
Stuck Key Refer to the “Keyboard or Auxiliary Input Device Check” 
section on page 66. 
Keyboard Error Refer to the “Keyboard or Auxiliary Input Device Check” 
section on page 66.
Keyboard Controller Failed Refer to the “Keyboard or Auxiliary Input Device Check” 
section on page...