Acer Aspire 1420pt Service Guide

Chapter 3141
Replacing the SIM Card
1.Insert the SIM card into the slot.
Replacing the Battery
1.Insert the battery outer edge into the slots.
2.Push the battery down into place. 

142Chapter 3
3.Lock the battery.
Replacing the Dummy Card
1.Insert the dummy card into the slot. 

Chapter 4143
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...

144Chapter 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 non-defective FRUs:
Computer Shuts down 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 4145
No Display Issue
If the Display doesn’t work, perform the following actions one at a time to correct the problem. Do not replace 
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....

146Chapter 4
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 34).
8.If the Issue is still not resolved, see “Online Support Information” on page 165.
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...

Chapter 4147
6.If the Issue is still not resolved, see “Online Support Information” on page 165.
LCD Failure
If the LCD fails, perform the following actions one at a time to correct the problem. Do not replace non-
defective FRUs:
Start
Check LCD
module?Swap
LCD cable /LCD panel
OK
NG
Check MB LCD
connector and
cable ?
OK
Reassemble
Re- plug LCD cable
OK
NG
Swap M/B
Start
Check LCD
module?Swap
LCD cable /LCD panel
OK
NG
Check MB LCD
connector and
cable ?
OK
Reassemble
Re- plug LCD cable
OK
NG
Swap M/B 

148Chapter 4
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 
non-defective FRUs:
Start
Keyboard properly
connected?NoDisconnect and
reconnect
Keyboard functioning?NoReplace Keyboard
Replace
mainboard 

Chapter 4149
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 non-defective FRUs:
Start
Check M/B T/P 
FFCRe-assemble the 
T/P FFC to M/B
OK
NG
Check 
TouchPad
OK
Swap/Reassemble 
the T/P board or 
T/P FFC
OK
NG
Swap M/B
Start
Check M/B T/P 
FFCRe-assemble the 
T/P FFC to M/B
OK
NG
Check 
TouchPad
OK
Swap/Reassemble 
the T/P board or 
T/P FFC
OK
NG
Swap M/B 

150Chapter 4
Internal Speaker Failure
If the internal Speakers fail, perform the following actions one at a time to correct the problem. Do not replace 
non-defective FRUs:
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...