Acer Aspire 8935g Service Guide

							Chapter 3191
Replacing the ODD Module
Replacing the Lower Covers
1.Insert the Lower Cover as shown.  1.With the ODD tray in the eject position, replace the ODD cover on the new ODD Module.
2.Secure ODD bracket with two screws.3.Slide the module in to the chassis and press until 
the module is flush with the chassis.
4.Replace the single screw to secure the Module. 
						

							192Chapter 3
2.Tighten the seven captive screws in the Lower Door.
    
						

							Chapter 3193
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.
1
2 
						

							194Chapter 3 
						

							Chapter 4195
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 305.
Symptoms (Verified)Go To
Power On Issue Page 196
No Display Issue Page 197
Random Loss of BIOS Settings Page 198
LCD Failure Page 199
Internal Keyboard Failure Page 200
TouchPad Failure Page 201
Internal Speaker Failure Page 202
Internal Microphone Failure Page 203
HDD Failure Page 204
USB (Right side) Failure Page 205
Other Functions Failure Page 205
Motherboard CMOS discharge Page 205
Intermittent Failures Page 205
Undermined Failures Page 206
Chapter 4 
						

							196Chapter 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 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 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 305.
Start
Ch eck    
AC /Battery 
Power onSw ap AC   /Battery  to 
try
OK
NG
Ch eck 
Daughter/B & 
FFC Wh eth er 
OK
OK
Swap Dau gh ter/B
Re-plug PWR FFC
OK
NG
Swap M/B 
						

							Chapter 4197
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.
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 196.
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 199.
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 54).
8.If the Issue is still not resolved, see “Online Support Information” on page 305.
START
Power On?Nogoto no power
trouble shooting
step
Replace
Ext. DDR RAM 
moduleNo
NoScrew it wellReplace
M/B
Connect
it wellNo
LCD module
OK?NoReplace
LCD panel/
LCD cable
Ext. DDRRAM
module well
connected?
Ext. DDRRAM
module OK?
CPU thermal 
module well
screw? 
						

							198Chapter 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 54.
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 54.
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 54.
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 305.
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 305.
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 305. 
						

							Chapter 4199
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 
modu le?Swap 
LCD cable /LCD  panel
OK
NG
Check MB LCD 
con n ector an d 
cable ?
OK
Reassemble
Re-plu g LCD cable
OK
NG
Swap M/B 
						

							200Chapter 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:
STAR T
Keyboar d FPC
wel l connec te d?NoCo n n ec t
it  w el l
Ke yboa rd O K?NoReplace
keyboard
R epl ace  M /B