Acer Aspire 7520g Service Guide

Chapter 365
NOTE: RF board on selected models only.
11 .Remove the four screws fastening the ODD board to the lower case.
12.Remove the ODD board from the lower case.
13.Remove the two screws fastening the audio board to the lower case.
14.Disconnect the audio board cable from the motherboard.
15.Disconnect the subwoofer cable from the audio board.
16.Remove the audio board from the lower case unit.
17.Remove the screw fastening the main board to the lower case.
18.Detach the main board from the lower...

66Chapter 3
20.Remove the three screws fastening the subwoofer to the lower case.
21.Remove the subwoofer from the lower case as shown. 

Chapter 367
Disassembling the Upper Case Assembly
1.Turn the upper case over.
2.Remove the two screws fastening the button board.
3.Detach the button board with FFC from the upper case as shown.
4.Remove the two screws fastening the LED board.
5.Detach the LED board with FFC from the upper case as shown.
6.Remove the four screws fastening the speakers.
7.Remove the speakers from the upper case as shown. 

68Chapter 3
Disassembling the LCD Module
1.Remove the four screw rubbers as shown.
2.Then remove the four screws fastening the LCD bezel.
3.Detach the LCD bezel from the LCD module carefully.
4.Remove the two screws holding the LCD and the one screw holding the inverter board to the LCD panel.
5.Detach the two inverter cable connectors from the inverter board.
6.Detach the CCD cable connector from the CCD board.
7.Remove the two screws fastening the CCD module to the LCD panel and remove the CCD module....

Chapter 369
10.Remove the four screws fastening the left LCD bracket and detach it.
11 .Remove the four screws fastening the right LCD bracket and detach it.
12.Disconnect the LCD cable from the rear side of the LCD. 

70Chapter 3
Disassembling the External Modules
Disassembling the HDD Module
1.Turn over the HDD module and remove the three screws fastening the HDD board.
2.Remove the HDD board.
3.Turn over the HDD module and remove the eight screws fastening the HDD bracket.
4.Remove the 
Disassembling the ODD Module
1.Remove the three screws holding the optical bracket.
2.Then remove the optical bracket from the optical disk drive. 

Chapter 471
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...

72Chapter 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 473
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...

74Chapter 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:
TReplace the System board.
TIf the problem is not corrected, see “Undetermined Problems” on page 88.
TIf the voltage is not correct, go to the next step.
NOTE: An audible noise from the power adapter does not...