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 remove the touchpad bracket.
11 .Use a flat headed screw driver to detach the touchpad board.
12.Then detach the touchpad carefully. 
						

							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 “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.Remove the two screws securing the SW DJ board assembly. 
						

							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 Assembly” on page 67.
8.Remove the screw securing the audio board.
9.Detach the audio board FFC.
10.Release the CIR receiver cable.
11 .Then detach the audio board.
Removing the VGA Thermal Module 
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. 
						

							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 board.
7.Disconnect the modem board connector.
8.Disconnect the modem board cable then remove the board.
Removing the Main 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” on page 67.
8.See “Removing the Audio Board” on page 68.
9.See “Removing the VGA Thermal Module” on page 68.
10.See “Removing the Modem Board” on page 69.
11 .Remove the two nut screws securing the main board.
12.Press the PCMCIA card button. 
						

							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” on page 67.
8.See “Removing the Audio Board” on page 68.
9.See “Removing the VGA Thermal Module” on page 68.
10.See “Removing the Modem Board” on page 69.
11 .See “Removing the Main Board” on page 69.
12.Turn over the main board as shown.
13.Disconnect the control board antenna.
14.Pop out the control board then remove it. 
						

							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 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 74.
POST does not complete. No beep or error 
codes are indicated.“Power-On Self-Test (POST) Error Message” on 
page 77
“Undetermined Problems” on page 89
POST detects an error and displayed messages 
on screen.“Error Message List” on page 78
Other symptoms (i.e. LCD display problems or 
others).“Power-On Self-Test (POST) Error Message” on 
page 77
Symptoms cannot be re-created (intermittent 
problems).Use the customer-reported symptoms and go to 
“Power-On Self-Test (POST) Error Message” on 
page 77
“Intermittent Problems” on page 88
“Undetermined Problems” on page 89
Troubleshooting
Chapter 4 
						

							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 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:
TNumeric keypad
TExternal keyboard
If any of these devices do not work, reconnect the cable connector and repeat the failing operation.  
						

							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 problem, power on the computer using each of the following power sources:
1.Remove the battery pack.
2.Connect the power adapter and check that power is supplied.
3.Disconnect the power adapter and install the charged battery pack; then check that power is supplied by 
the battery pack.
If you suspect a power problem, see the appropriate power supply check in the following list:
T“Check the Power Adapter” on page 75
T“Check the Battery Pack” on page 76 
						

							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 always indicate a defect.
3.If the power-on indicator does not light up, check the power cord of the power adapter for correct 
continuity and installation.
4.If the operational charge does not work, see “Check the Battery Pack” on page 76. 
Pin 1: +19 to +20.5V
Pin 2: 0V, Ground