Acer Aspire 6920 Service Guide

							Chapter 369
Removing the ODD and Dummy cards
25.Remove the screw fastening the optical disk drive module on the bottom.
26.Use a tool to push the optical disk drive module outwards and remove the ODD module
Removing the Hinge cover
 
27.Remove two hinge cover screws.
28.Then detach the Hinge cover from both side. 
						

							70Chapter 3
Removing the BTCB screws
29.Loose 21 screws from BTCB.
30.Detach Switch cover.
31.Disconnect Media board FFC from the Switch cover 
						

							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.Remove the 18 screws fastening the upper case and the lower case assembly as shown.
5.Disconnect the FFC from the main board.
6.Loose two screws from the TPCB.
7.Disconnect the LCM cable.
8.Pull out the Power cable.
9.Pull out the Wireless antenna.
10.Release four TPCB locker then remove the TCB from machine. 
						

							72Chapter 3
Disassembling the LED boards
11 .Loose the LED boards four screws.
12.Remove two LED boards from the machine.
13.Loose four LCM hinge screws.
14.Then remove LCM module from the machine. 
						

							Chapter 373
Remove I/O baord and Main Board.
15.Loose the daughter board screw then remove the daughter board from the machine.
16.Disconnect four cables on the M/B as shown.
17.Loose the M/B screw, remove RJ11 connector from the BTCB.
18.Remove M/B from the BTCB. 
						

							74Chapter 3
19.Disconnect LED/B cable and USB/B FFC.
20.Remove the USB board from BTCB..
21.Loose two Modem card screws.
22.Disconnect Modem card cable.
23.Remove Modem card from the M/B.
Disassembly LCM module
1.Remove six LCM bezel mylar.
2.Loose 11 LCM bezel screws.
3.Remove LCM bezel.
4.Disconnect Inverter cable and Back LED board cable.
5.Disconnect CCD cable..
6.Loose four LCD scrws from the hinge.
7.Remove the LCD panel. 
						

							Chapter 375
8.Remove the Inverter board.
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 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 81.
POST does not complete. No beep or error 
codes are indicated.“Power-On Self-Test (POST) Error Message” on 
page 84
“Undetermined Problems” on page 96
POST detects an error and displayed messages 
on screen.“Error Message List” on page 85
Other symptoms (i.e. LCD display problems or 
others).“Power-On Self-Test (POST) Error Message” on 
page 84
Symptoms cannot be re-created (intermittent 
problems).Use the customer-reported symptoms and go to 
“Power-On Self-Test (POST) Error Message” on 
page 84
“Intermittent Problems” on page 95
“Undetermined Problems” on page 96
Troubleshooting
Chapter 4 
						

							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 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