Acer Aspire 5739 Service Guide

Chapter 3131
Replacing the Battery
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 

132Chapter 3 

Chapter 4133
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...

134Chapter 3
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: 

Chapter 3135
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...

136Chapter 3
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: 

Chapter 3137
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...

138Chapter 3
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 48.
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 48....

Chapter 3139
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: 

140Chapter 3
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: