Acer Aspire 5942 Service Guide

Chapter 3129
Replacing the Lower Covers
Replacing the SD Dummy Card
Push the SD Dummy into the slot until an audible click indicates that the card is correctly inserted. 1.Replace the Memory Cover back edge first as 
shown.2.Replace the memory/HDD cover back edge first as 
shown.
IMPORTANT: Ensure that the all the securing tabs are correctly located in the casing.
3.Secure the four captive screws.
HDD 
Cover WLAN 
Cover 

130Chapter 3
Replacing the PCI Express Dummy Card
Push the Express 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 4131
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...

132Chapter 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 4133
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...

134Chapter 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 42.
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 42....

Chapter 4135
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: 

136Chapter 4
TouchPad Failure
If the To u c h P a 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: 

Chapter 4137
Sound Problems
If sound problems are experienced, perform the following actions one at a time to correct the problem.
1.Reboot the computer.
2.Navigate to Start´ Control Panel´ System and Maintenance´ System´ Device Manager. 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.
3.Roll back the audio driver to the previous version, if...

138Chapter 4
Internal Microphone Failure
If the internal Microphone fails, perform the following actions one at a time to correct the problem. Do not 
replace a non-defective FRUs:
Microphone Problems
If internal or external Microphones do no operate correctly, perform the following actions one at a time to 
correct the problem.
1.Check that the microphone is enabled. Navigate to Start´ Control Panel´ Hardware and Sound´ 
Sound and select the Recording tab.
2.Right-click on the Recording tab and select...