Acer Travelmate 4650 Service Guide

62Chapter 3
3.Detach the VGA board out from the system 
4.Remove the 3 screws to release the VGA thermal module
5.Separate the thermal module from the VGA board
6.Anit-clockwise the direction with a flat screw driver to loosen the CPU 
7.Detach the CPU out from the system
Removing the MDC
1.Disconnect the MDC cable from the mainboard 
2.Remove the two screws to loosen the DMC board
3.Detach the MDC from the system
4.Disconnect the MDC cable from the MDC board  
Removing the Wireless, Speaker and PCMCIA...

Chapter 363
2.Remove the one screw located on each speaker then detach the speakers out from the system
3.Press down the button to release the PCMCI dummy card then pull the dummy card out from the system
4.Remove the one screw to loosen the mainobard
5.Push outward of the side before releasing the mainboard out from the chassis
Removing the LCD Panel
1.Detach the upper LCD rubbers
2.Detach the LCD mylars from the lower side 

64Chapter 3
3.Detach the front bezel out from the LCD module
4.Disconnect the LCD power cable  from here
5.Disconnect the LCD coaxial cable from here
6.Detach the invertor board out from the position
7.Remove the one screw on each side to detach the LCD panel from the case 
8.Lift up the panel then take it out from the case
9.Remove the one screw on each side to detach the antenna from the case
10.Gently to tear the tabs that fasten the antenna cables from the case
11 .Then detach the antenna cables from...

Chapter 365
14.Tear the tab before you disconnect the LCD wire
15.Take the LCD wire from here
Removing the HDD and ODD
1.Remove the two screws on each side
2.Detach the HDD bracket from the HDD unit
3.Remove the two screws located on both side to detach the ODD unit from bracket
4.Push backward to release the ODD bracket from the ODD unit
5.Remove the two screws to release ODD board from the rear of the ODD unit
6.Detach the ODD board from the rear side of ODD 

Chapter 466
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.
TroubleshootingChapter 4 

67Chapter 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 468
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 the connector. A loose connection can cause an error.
Power System Check
To verify the symptom of the...

69Chapter 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 80.
TIf the voltage is not correct, go to the next step.
NOTE: An audible noise from the power adapter does not...

Chapter 470
Check the Battery Pack 
To check the battery pack, do the following:
From Software:
1.Check out the Power Management in control Panel
2.In Power Meter, confirm that if the parameters shown in the screen for Current Power Source and Total 
Battery Power Remaining are correct.
3.Repeat the steps 1 and 2, for both battery and adapter.
4.This helps you identify first the problem is on recharging or discharging. 
From Hardware:
1.Power off the computer. 
2.Remove the battery pack and measure the...

71Chapter 4
Power-On Self-Test (POST) Error Message 
The POST error message index lists the error message and their possible causes. The most likely cause is 
listed first.
NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU 
replacement does not solve the problem, put the original part back in the computer. Do not replace a 
non-defective FRU.
This index can also help you determine the next possible FRU to be replaced when servicing a computer.
If the...