Acer Travelmate 4050 Service Guide

							44Chapter 3
Removing HDD Module, ODD and Memory Module
Removing the HDD Module
1.Remove the one screw.
2.Pull the entire HDD out fromm the sytem.
Removing the ODD Module
1.Remove the one screw to release the ODD.
2.Pull the entire ODD out from the system.
Removing the Memory
1.Remove the two screws that secure the DIMM cover.
2.Remove the DIMM cover.
3.Pop out the memory then remove it. 
						

							Chapter 345
Removing the Keyboard/LCD Module
Removing the Keyboard
1.Use a plastic flat head screw driver or any plastic tool to detach the middle cover carefully.
2.Then remove the middle cover from the main unit.
3.Remove the two screws holding the keyboard.
4.Turn the keyboard over as the picture shows.
5.Disconnect the keyboard cable then remove the keyboard.
Removing the Power Switch Board, Thermal and MDC
1.Remove the one screw to release the power switch board.
2.Detach the power switch board from the system.
3.Remove the one screw to release the thermal door.
4.Detach the thermal door out from the system.  
						

							46Chapter 3
5.Remove the two screws to release the wireless door.
6.Detach the wirless door.
7.Remove the two screws to release the MDC.
8.Detach the MDC away from the system.
Removing the LCD module
1.Remove one screw as the picture shows.
2.Then disconnect the LCD coaxial cable.
3.Disconnect the antenna.
4.Remove the two screws located at rear side to release the panel.
5.Remove the two screws located on the bottom. 
						

							Chapter 347
Disassembling the Main Unit
1.Disconnect the wire cable from the mainboard .
2.Be caution of the cable to release from the tab before you to conduct the panel disassemble.
3.Detach the entire panel out from the system.
4.Remove the four screws to release the thermal.
5.Detach the thermal board and disconnect the thermal cable from the mainboard. 
6.With a flat screwdriver to release the CPU with anti-clockwise direction.
7.Detach the CPU from the socket. 
8.Push outward both side latches to release the wireless board and take it away.
9.Take the MDC board out from the mainboard with plastic flat screwdrive tool.
10.Disconnect the MDC cable from the MDC board. 
						

							48Chapter 3
1.Remove the four screws to detach the panel cover from panel moudle.
2.Detach the cover from the panel.
.
3.Remove the two screws on both sides that fasten the LCD bracket.
4.Disconnect the backlight cable and wireless cable from the invertor board.
5.Detach the LCD panel.
6.Remove the four screws on each side to release the panel bracket.
7.Disconnect the coaxial cable.
8.Remove one screw.
9.Detach the invertor board from the position.
10.Remove the two screws to release the anntenna. 
						

							Chapter 349
11 .Remove the 10 screws to release the lower case.
12.Remove the 3 screws located at the upper case.
13.Disconnect the touchpad FPC from the mainboard.
14.Disconnect the speaker cable.
15.Then detach the upper case assembly. 
						

							50Chapter 3
16.Remove the two screws to release the touchpad support bracket .
17.Disconnect the touchpad FPC.
18.Push toward left direction and take the touchpad support bracket.
19.Detach the touchpad out from the upper case .
20.Remove the one screw to release the mainboard.
21.Disconnect the LED cable.
22.Detach the mainboard out from the chassis.
23.Detach the LED board.
24.Remove the four screws to release the PCMCIA slot from MB.
25.Detach the PCMCIA from the mainboard. 
26.Remove the three screws to release the fan.
27.Detach the fan from the thermal module. 
						

							Chapter 351
28.Remove the two screws fastening the speakers.
29.Detach the speakers on each side.
Disassembling the HDD Module
1.Remove the two screws holding the HDD bracket on one side.
2.Detach the HDD unit from the bracket.
3.Detach the ESD plate from the HDD unit.
4.Remove the 3 screws to release the ODD module
5.Detach the ODD bracket.
6.Detach the ODD cover. 
						

							Chapter 452
System Check Procedures
External Diskette Drive Check
Do the following steps 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.The FDD heads can become dirty over time, affecting their performance. Use an FDD cleaning kit to clean 
the heads. If the FDD still does not function properly after cleaning, go to next step.
2.Boot from diagnostic program.
3.If an error occurs with the internal diskette drive, reconnect the diskette connector on the main board.
If the error still remains:
1.Reconnect the external diskette drive module.
2.Replace the external diskette drive module.
3.Replace the main board.
External CD-ROM/DVD-ROM Drive Check
Do the following to isolate the problem to a controller, drive, or CD-ROM/DVD-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.Insert an audio CD into the CD/DVD drive. If the CD/DVD drive can read the data from the audio CD. The 
drive does not have problem, then go to next step. If the CD/DVD LED on the front panel does not emit 
light as it read the data from the audio CD, then go to next step. However, if the CD/DVD drive can not 
read data from the audio CD, you may need to clean the CD/DVD drive with a CD/DVD drive cleaning 
disk.
2.Make sure that the appropriate driver has been installed on the computer for the CD/DVD drive.
3.Boot from the diagnostics diskette and start the diagnostics program 
4.See if CD-ROM Test is passed when the program runs to CD-ROM/DVD-ROM Test.
5.Follow the instructions in the message window.
If an error occurs, reconnect the connector on the main board. If the error still remains:
1.Reconnect the CD-ROM/DVD-ROM module.
2.Replace the CD-ROM/DVD-ROM module.
3.Replace the main board.
Troubleshooting
Chapter 4 
						

							53Chapter 4
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 main 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:
TEmbedded Numeric Keypad
TExternal keyboard
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. 
Currently, we do not provide memory test program. However, if you need to check memory but have no testing 
program or diagonositc utility at hand, please go to http://www.passmark.com to download the shareware 
“BurnIn Test V.3.0”. You may test the memory with this program under Window XP environment.
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.