Acer Aspire 5935 Service Guide

							Chapter 3121
Replacing the Switch Cover
Replacing the WLAN Module
1.Place the Switch Cover left side first on to the 
upper case as shown.2.Press down on the sides of the cover to secure it in 
place.
3.Press down the centre of the cover to secure it in 
place.4.Turn the computer over and secure the single 
securing screw.
NOTE: The Switch Cover securing screw is not 
used on some production models.
1.Insert the WLAN board into the WLAN socket.2.Replace the single screw to secure the module. 
						

							122Chapter 3
3.Connect the two antenna cables to the module.
NOTE: The black antenna cable connects to the 
upper terminal and the white antenna cable 
to the lower terminal.4.Tuck the gray cable down the side of the WLAN 
Module, as shown, to avoid trapping. 
						

							Chapter 3123
Replacing the DIMM Modules
Replacing the Hard Disk Drive Module
1.Insert the DIMM Module in place.2.Press down to lock the DIMM module in place.
1.Place the HDD in the HDD carrier.2.Replace the four screws to secure the carrier.
3.Insert the HDD, interface side first, and lower it into 
place.4.Slide the HDD in the direction of the arrow to 
connect the interface. 
						

							124Chapter 3
Replacing the ODD Module
1.With the ODD tray in the eject position, replace the 
ODD cover on the new ODD Module.2.Press the cover into the tray, bottom edge first, to 
secure.
3.Secure ODD bracket with two screws.4.Slide the module in to the chassis and press until 
the module is flush with the chassis.
5.Replace the single screw to secure the Module. 
						

							Chapter 3125
Replacing the Lower Covers
1.Replace the Memory Cover back edge first as 
shown.2.Press down the left side as shown.
IMPORTANT: Ensure that the all the securing tabs are correctly located in the casing.
3.Secure the four captive screws.
HDD 
Cover Memory 
Cover 
						

							126Chapter 3
Replacing the SD Dummy Card
Push the SD Dummy into the slot until an audible click indicates that the card is correctly inserted.
Replacing the Battery
1.Slide and hold the battery release latch to the 
release position (1), insert the battery pack and 
press down (2).2.Slide the battery lock in the direction shown to 
secure the battery in place.
12 
						

							Chapter 4127
Troubleshooting
Common Problems
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.
4.If the Issue is still not resolved, see “Online Support Information” on page 209.
Symptoms (Verified)Go To
Power On Issue Page 128
No Display Issue Page 129
LCD Failure Page 131
Internal Keyboard Failure Page 131
TouchPad Failure Page 132
Internal Speaker Failure Page 132
Internal Microphone Failure Page 134
ODD Failure Page 136
Modem Failure Page 139
WLAN Failure Page 139
Thermal Unit Failure Page 140
Other Functions Failure Page 141
Intermittent Failures Page 142
Undermined Failures Page 142
Chapter 4 
						

							128Chapter 4
Power On Issue
If the system doesn’t power on, perform the following actions one at a time to correct the problem. Do not 
replace a non-defective FRUs:
Computer Shutsdown Intermittently
If the system powers off at intervals, perform the following actions one at a time to correct the problem.
1.Check the power cable is properly connected to the computer and the electrical outlet. 
2.Remove any extension cables between the computer and the outlet.
3.Remove any surge protectors between the computer and the electrical outlet. Plug the computer directly 
into a known good electrical outlet. 
4.Disconnect the power and open the casing to check the Thermal Unit (see “Thermal Unit Failure” on page 
140) and fan airways are free of obstructions.
5.Remove all external and non-essential hardware connected to the computer that are not necessary to 
boot the computer to the failure point.
6.Remove any recently installed software.
7.If the Issue is still not resolved, see “Online Support Information” on page 209. 
						

							Chapter 4129
No Display Issue
If the Display doesn’t work, perform the following actions one at a time to correct the problem. Do not replace 
a non-defective FRUs:
No POST or Video
If the POST or video doesn’t display, perform the following actions one at a time to correct the problem.
1.Make sure that the internal display is selected. On this notebook model, switching between the internal 
display and the external display is done by pressing Fn+F5. Reference Product pages for specific model 
procedures.
2.Make sure the computer has power by checking at least one of the following occurs:
• Fans start up 
• Status LEDs light up
If there is no power, see “Power On Issue” on page 128.
3.Drain any stored power by removing the power cable and battery and holding down the power button for 
10 seconds. Reconnect the power and reboot the computer.
4.Connect an external monitor to the computer and switch between the internal display and the external 
display is by pressing Fn+F5 (on this model). 
If the POST or video appears on the external display, see “LCD Failure” on page 131.
5.Disconnect power and all external devices including port replicators or docking stations. Remove any 
memory cards and CD/DVD discs. Restart the computer.
If the computer boots correctly, add the devices one by one until the failure point is discovered.
6.Reseat the memory modules.
7.Remove the drives (see “Disassembly Process” on page 46).
8.If the Issue is still not resolved, see “Online Support Information” on page 209. 
						

							130Chapter 4
Abnormal Video Display
If video displays abnormally, perform the following actions one at a time to correct the problem.
1.Reboot the computer.
2.If permanent vertical/horizontal lines or dark spots display in the same location, the LCD is faulty and 
should be replaced. See “Disassembly Process” on page 46.
3.If extensive pixel damage is present (different colored spots in the same locations on the screen), the LCD 
is faulty and should be replaced. See “Disassembly Process” on page 46.
4.Adjust the brightness to its highest level. See the User Manual for instructions on adjusting settings. 
NOTE: Ensure that the computer is not running on battery alone as this may reduce display brightness.
If the display is too dim at the highest brightness setting, the LCD is faulty and should be replaced. See 
“Disassembly Process” on page 46.
5.Check the display resolution is correctly configured:
a.Minimize or close all Windows. 
b.If display size is only abnormal in an application, check the view settings and control/mouse wheel 
zoom feature in the application. 
c.If desktop display resolution is not normal, right-click on the desktop and select 
Personalize´ Display Settings. 
d.Click and drag the Resolution slider to the desired resolution. 
e.Click Apply and check the display. Readjust if necessary.
6.Roll back the video driver to the previous version if updated.
7.Remove and reinstall the video driver.
8.Check the Device Manager to determine that:
• The device is properly installed. There are no red Xs or yellow exclamation marks. 
• There are no device conflicts. 
• No hardware is listed under Other Devices.
9.If the Issue is still not resolved, see “Online Support Information” on page 209.
10.Run the Windows Memory Diagnostic from the operating system DVD and follow the onscreen prompts.
11 .If the Issue is still not resolved, see “Online Support Information” on page 209.
Random Loss of BIOS Settings
If the computer is experiencing intermittent loss of BIOS information, perform the following actions one at a 
time to correct the problem.
1.If the computer is more than one year old, replace the CMOS battery.
2.Run a complete virus scan using up-to-date software to ensure the computer is virus free.
3.If the computer is experiencing HDD or ODD BIOS information loss, disconnect and reconnect the power 
and data cables between devices.
If the BIOS settings are still lost, replace the cables.
4.If HDD information is missing from the BIOS, the drive may be defective and should be replaced. 
5.Replace the Motherboard.
6.If the Issue is still not resolved, see “Online Support Information” on page 209.