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43.Disconnect the touchpad button board FFC.
44.Release nine locks that secure the touchpad cover.
45.Detach the touchpad cover.
46.Remove the touchpad.
47.Unscrew the four screws holding the antenna line. Two on each side.
48.Remove the antenna line from the upper case.
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Disassembling the LCD Module
1.Remove the four screwpad then unscrew the four screws on the LCD bezel.
2.Detach the LCD bezel from the lower side of the LCD module carefully..
3.Unscrew the screw that holds the LCD inverter.
4.Disconnect the inverter board.
5.Remove the inverter wire.
6.Unscrew the four screws that fasten the LCD to LCD panel. Two on each side.
7.Remove the LCD from the LCD panel.
8.Remove the four (two on each side) screws holding the two LCD brackets then take the brackets away.
9.Tear off the mylar that fastens the LCD coaxial cable.
10.Disconnect the LCD coaxial cable.
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Disassembling the External Modules
Disassembling the HDD Module
1.Remove the screw holding the HDD cover.
2.Take the HDD out of the HDD cover.
3.Remove the four (two on each side) screws on HDD carrier.
4.Remove the HDD from HDD carrier.
5.Disconnect the HDD connector.
Disassembling the Optical Disk Drive Module/Combo Drive Module
1.Unscrew the two screws holding the ODD cover.
2.Remove another two screws that fasten the ODD cover.
3.Take the ODD assembly out of the ODD cover.
4.Remove the two screws that secure the ODD PCB board.
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5.Remove the ODD PCB board.
6.Release the ODD door latch on one side.
7.Then remove the ODD door carefully.
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Use the following procedure as a guide for computer problems.
NOTE: The diagnostic tests are intended to test this model (TravelMate 420 series). Non-Acer products,
prototype cards, or modified options can give false errors and invalid system responses.
1.Obtain the failed 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.If any problem occurs, you can perform visual inspection before you fellow this chapter’s instructions. You
can check the following:
power cords are properly connected and secured;
there are no obvious shorts or opens;
there are no obviously burned or heated components;
all components appear normal.
4.After you perform visual inspection you can also verify the following:
ask the user if a password is registered and, if it is, ask him or her to enter the password.
verify with the customer that Wndows XP is installed on the hard disk. Operating systems that
were not preinstalled by Acer can cause malfunction.
make sure all optional equipment is removed from the computer.
make sure the floppy disk is empty.
5.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 79.
POST does not complete. No beep or error
codes are indicated.“Power-On Self-Test (POST) Error Message” on
“Undetermined Problems” on page 90
POST detects an error and displayed messages
on screen.“Error Message List” on page 84
The diagnostic test detected an error and
displayed a FRU code.“System Diagnostic Diskette” on page 52
Other symptoms (i.e. LCD display problems or
others).“Power-On Self-Test (POST) Error Message” on
Symptoms cannot be re-created (intermittent
problems).Use the customer-reported symptoms and go to
“Power-On Self-Test (POST) Error Message” on
“Intermittent Problems” on page 89
“Undetermined Problems” on page 90
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