Acer Travelmate 8431 Service Guide

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3.Remove the wireless card.  
4.Remove ODD. 
						

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5.Use the sleeve to remove the rubber and remove all of the screw on the back of the BAP41.   
Remove Keyboard
1.Disconnect five latches on the keyboard. 
2.Remove the FFC behind the keyboard.  
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Remove FFC of main board and sub board
1.Remove screw and FFC on the topper case and  remove the topper case.
2.Remove Power Board.  
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3.Remove the FFC and screw on the Wireless board.
4.Remove the FFC on the panel and remove Card reader board.  
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5.Remove connector on the audio board and remove two screws on it.
6.Remove the cable on the back of audio board.
7.Remove the connector of Bluetooth.
8.Remove the cable of LCD and Connector of Fan.  
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9.Remove the mainboard.
Remove Panel
1.Remove four screws on the bottom of panel and remove the panel.
  
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2.Remove four sponges on the LCD and remove four screws under them.
3.Remove the bezel on the panel and remove four screws on it.   
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4.Remove LCM cable on the back of panel.
Disassembling the External Module
Disassembling the HDD Module
1.Remove HDD bezel and get HDD out of cover. 
						

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Use the following procedure as a guide for computer problems.
NOTE: The diagnostic tests are intended to test only Acer products. Non-Acer products, prototype cards, or 
modified options can give false errors and invalid system responses.
1.Obtain the failing symptoms in as much detail as possible.
2.Verify the symptoms by attempting to re-create the failure by running the diagnostic test or by repeating 
the same operation.
3.Use the following table with the verified symptom to determine which page to go to.
Symptoms (Verified)Go To
Power failure. (The power indicator does not 
go on or stay on.)“Power System Check” on page 53.
POST does not complete. No beep or error 
codes are indicated.“Power-On Self-Test (POST) Error Message” 
on page 55.
“Undetermined Problems” on page 68.
POST detects an error and displayed 
messages on screen.“Error Message List” on page 56.
Other symptoms (i.e. LCD display problems or 
others).“Power-On Self-Test (POST) Error Message” 
on page 55.
Symptoms cannot be re-created (intermittent 
problems).Use the customer-reported symptoms and go 
to “Power-On Self-Test (POST) Error 
Message” on page 55.
“Intermittent Problems” on page 67.
“Undetermined Problems” on page 68.
Troubleshooting
Chapter 4 
						

							52Chapter 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.
NOTE: Make sure that the diskette does not have more than one label attached to it. Multiple labels can cause 
damage to the drive or cause the drive to fail. 
Do the following to select the test device.
1.Boot from the diagnostics diskette and start the diagnostics program.
2.See if FDD Test is passed as the program runs to FDD Test.
3.Follow the instructions in the message window.
If an error occurs with the internal diskette drive, reconnect the diskette connector on the system board.
If the error still remains:
1.Reconnect the external diskette drive/DVD-ROM module.
2.Replace the external diskette drive/CD-ROM module.
3.Replace the main board.
External CD-ROM Drive Check
Do the following to isolate the problem to a controller, drive, or CD-ROM. Make sure that the CD-ROM does 
not have any label attached to it. The label can cause damage to the drive or can cause the drive to fail.
Do the following to select the test device:
1.Boot from the diagnostics diskette and start the diagnostics program.
2.See if CD-ROM Test is passed when the program runs to CD-ROM Test.
3.Follow the instructions in the message window.
If an error occurs, reconnect the connector on the System board. If the error still remains:
1.Reconnect the external diskette drive/CD-ROM module.
2.Replace the external diskette drive/CD-ROM module.
3.Replace the main board.
Keyboard or Auxiliary Input Device Check
Remove the external keyboard if the internal keyboard is to be tested.
If the internal keyboard does not work or an unexpected character appears, make sure that the flexible cable 
extending from the keyboard is correctly seated in the connector on the system board.
If the keyboard cable connection is correct, run the Keyboard Test. 
If the tests detect a keyboard problem, do the following one at a time to correct the problem. Do not replace a 
non-defective FRU:
1.Reconnect the keyboard cables.
2.Replace the keyboard.
3.Replace the main board.
The following auxiliary input devices are supported by this computer:
‰Numeric keypad
‰External keyboard
If any of these devices do not work, reconnect the cable connector and repeat the failing operation.