Acer Travelmate 4070 Service Guide

Chapter 366
 
Removing the Touchpad Bracket, the Touchpad Board and the Touchpad
1.See “Removing the Battery” on page 56.
2.See “Removing the Middle Cover” on page 60.
3.See “Removing the Keyboard” on page 60.
4.See “Removing the Power Board” on page 65.
5.See “Removing the Upper Case Assembly” on page 65.
6.Pull back the tape covering the touchpad FFC.
7.Disconnect the touchpad FFC the remove it.
8.Remove the four screws securing the touchpad bracket.
9.Slide the touchpad bracket back as shown.
10.Then...

67Chapter 3
Removing the Speaker Set
1.See “Removing the Battery” on page 56.
2.See “Removing the Middle Cover” on page 60.
3.See “Removing the Keyboard” on page 60.
4.See “Removing the Power Board” on page 65.
5.See “Removing the Upper Case Assembly” on page 65.
6.Disconnect the SW DJ board cable.
7.Disconnect the CIR receiver cable.
8.Then disconnect the audio board FFC cable.
9.Disconnect the speaker set cable.
10.Then detach the speaker set from the lower case.
Removing the SW DJ Board Assembly
1.See...

Chapter 368
8.Remove the SW DJ board assembly from the lower case.
9.Remove the two screws securing the SW DJ board and SW DJ board bracket.
10.Then remove the SW DJ board. 
Removing the Audio Board
1.See “Removing the Battery” on page 56.
2.See “Removing the Middle Cover” on page 60.
3.See “Removing the Keyboard” on page 60.
4.See “Removing the Power Board” on page 65.
5.See “Removing the Upper Case Assembly” on page 65.
6.See “Removing the Speaker Set” on page 67.
7.See “Removing the SW DJ Board...

69Chapter 3
4.See “Removing the Power Board” on page 65.
5.See “Removing the Upper Case Assembly” on page 65.
6.Remove the three screws securing the VGA thermal module.
7.Then detach the VGA thermal module.
Removing the Modem Board 
1.See “Removing the Battery” on page 56.
2.See “Removing the Middle Cover” on page 60.
3.See “Removing the Keyboard” on page 60.
4.See “Removing the Power Board” on page 65.
5.See “Removing the Upper Case Assembly” on page 65.
6.Remove the two screws securing the modem...

Chapter 370
13.Remove the dummy card.
14.Remove the two screws securing the main board to the lower case.
15.Then detach the main board from the lower case carefully.
Removing the Control Board
1.See “Removing the Battery” on page 56.
2.See “Removing the Middle Cover” on page 60.
3.See “Removing the Keyboard” on page 60.
4.See “Removing the Power Board” on page 65.
5.See “Removing the Upper Case Assembly” on page 65.
6.See “Removing the Speaker Set” on page 67.
7.See “Removing the SW DJ Board Assembly”...

71Chapter 3 

Chapter 472
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...

73Chapter 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 474
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...

75Chapter 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 89.
TIf the voltage is not correct, go to the next step.
NOTE: An audible noise from the power adapter does not...