Acer Aspire 8920 Service Guide

Chapter 371
Disassembling the Main Unit
1. Turn over the keyboard as the image shows.
2.Disconnect the Keyboard FFC from the main board
3.Then remove the keyboard from the main unit.
4.Disconnect the FFC from the main board.
5.Loose One screws from the TPCB.
6.Disconnect the LCM cable.
7.Pull out the Power cable.
8.Pull out the Wireless antenna.
9.Release four TPCB locker then remove the TCB from machine.
Disassembling the LED boards
10.Loose the LED boards four screws.
11 .Remove two LED boards from the...

72Chapter 3
12.Loose four LCM hinge screws.
13.Then remove LCM module from the machine.
Remove I/O baord and Main Board.
14.Remove the daughter board from the machine. 

Chapter 373
15.Loose two Modem card screws.
16.Disconnect Modem card cable.
17.Remove Modem card from the M/B.
18.Disconnect Speaker cable from the MB and loose the MB screw.
19.Remove M/B from the BTCB.
20.Remove RJ11 from the BTCB. 

74Chapter 3
21.Remove the USB board from BTCB..
Disassembly LCM module
1.Remove six LCM bezel mylar.
2.Loose 10 LCM bezel screws.
3.Remove LCM bezel.
4.Disconnect Inverter cable and Back LED board cable.
5.Remove Inverter from BTCB..
6.Loose four LCD scrws from the hinge.
7.Disconnect CCD cable.
8.Remove the LCD panel. 

Chapter 375
9.Loose four LCD hinge screws, then remove two hinges from LCD panel. 

76Chapter 3
Disassembling the External Modules
Disassembling the HDD Module
1.Remove the four screws holding the HDD (hard disk drive) foil; two on each side.
2.Carefully take out the hard disk drive from the HDD foil.
Disassembling the ODD Module
1.Remove the two screws holding the optical bracket.
2.Then remove the optical bracket from the optical disk drive. 

Chapter 479
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...

80Chapter 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...

Chapter 481
If any of these devices do not work, reconnect the cable connector and repeat the failing operation. 
Memory check
Memory errors might stop system operations, show error messages on the screen, or hang the system.
1.Boot from the diagnostics diskette and start the doagmpstotics program (please refer to main board.
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.
NOTE: Make sure that the DIMM is fully installed into...

82Chapter 4
Check the Power Adapter
Unplug the power adapter cable from the computer and measure the output voltage at the plug of the power 
adapter cable. See the following figure
1.If the voltage is not correct, replace the power adapter.
2.If the voltage is within the range, do the following:
                   Replace the System board.
                   If the problem is not corrected, see “Undetermined Problems” on page 96.
                   If the voltage is not correct, go to the next step....