Acer Aspire 4935 Service Guide

Chapter 3141
Replacing the Hard Disk Drive Module
Replacing the DIMM Modules
NOTE: To replace DIMM Module 2, first remove DIMM Module 1. In this procedure, only DIMM Module 1 is 
shown.  1.Place the HDD carrier on the HDD.2.Replace the four securing screws (two each side).
3.Place the HDD Module in the HDD bay as shown and slide it in the direction of the arrow to connect the 
interface.
1.Insert the DIMM Module flush with the connector and press down to lock in place. 

142Chapter 3
Replacing the WLAN Module
Replacing the Lower Covers
1.Insert the WLAN board into the WLAN socket.2.Replace the two screws to secure the module.
3.Connect the two antenna cables to the module.
NOTE: The White cable goes to the upper terminal 
and the black cable to the lower terminal.IMPORTANT: Ensure that the cabling is replaced as 
shown to avoid trapping when the covers are 
replaced.
1.Replace the Lower Covers and secure the captive screws.
WLAN 
Cover
HDD 
Cover
DIMM 
Cover 

Chapter 3143
Replacing the ExpressCard and SD Card Dummy Trays
Replacing the Battery
1.Insert the ExpressCard and push into the slot until 
flush with the chassis cover.2.Insert the SD Card and push into the slot until flush 
with the chassis cover.
1.Slide and hold the battery release latch to the 
release position (1), then insert the battery and 
press down (2).2.Slide the battery lock/unlock latch to the lock 
position.
1
2 

144Chapter 3 

Chapter 4145
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...

146Chapter 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...

Chapter 4147
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...

148Chapter 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 52.
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 52....

Chapter 4149
LCD Failure
If the LCD fails, perform the following actions one at a time to correct the problem. Do not replace a non-
defective FRUs:
Built-In Keyboard Failure
If the built-in Keyboard fails, perform the following actions one at a time to correct the problem. Do not replace 
a non-defective FRUs: 

150Chapter 4
Touchpad Failure
If the To u c h pa d doesn’t work, perform the following actions one at a time to correct the problem. Do not 
replace a non-defective FRUs:
Internal Speaker Failure
If the internal Speakers fail, perform the following actions one at a time to correct the problem. Do not replace 
a non-defective FRUs: