Acer Aspire 4930 4930G Series User Manual

							Chapter 4151
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 209.
Symptoms (Verified)Go To
Power On Issue Page 152
No Display Issue Page 153
LCD Failure Page 155
Internal Keyboard Failure Page 155
Touch Pad Failure Page 156
Internal Speaker Failure Page 156
Internal Microphone Failure Page 158
ODD Failure Page 160
Rightside USB Failure Page 163
Modem Failure Page 163
WLAN Failure Page 164
Acer EasyLaunch Button Failure Page 164
Acer MediaTouch Failure Page 165
Fingerprint Reader Failure Page 165
Thermal Unit Failure Page 166
HDTV Switch Failure Page 166
Other Functions Failure Page 167
Intermittent Failures Page 168
Undermined Failures Page 168
Chapter 4 
						

							152Chapter 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 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 (see “Thermal Unit Failure” on page 
166) and fan airways are free of obstructions.
5.Disable the power management settings in the BIOS to ensure they are not the cause of the problem (see 
“Power” on page 47).
6.Remove all external and non-essential hardware connected to the computer that are not necessary to 
boot the computer to the failure point.
7.Remove any recently installed software.
8.If the Issue is still not resolved, see “Online Support Information” on page 209. 
						

							Chapter 4153
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 
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 152.
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 155.
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 58).
8.If the Issue is still not resolved, see “Online Support Information” on page 209. 
						

							154Chapter 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 58.
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 58.
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 58.
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 209.
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 209.
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 209. 
						

							Chapter 4155
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: 
						

							156Chapter 4
Touch Pad 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 4157
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 updated recently.
4.Remove and reinstall the audio driver.
5.Ensure that all volume controls are set mid range:
a.Click the volume icon on the taskbar and drag the slider to 50. Ensure that the volume is not muted.
b.Click Mixer to verify that other audio applications are set to 50 and not muted.
6.Navigate to Start´ Control Panel´ Hardware and Sound´ Sound. Ensure that Speakers are selected 
as the default audio device (green check mark).
NOTE: If Speakers does not show, right-click on the Playback tab and select Show Disabled Devices 
(clear by default).
7.Select Speakers and click Configure to start Speaker Setup. Follow the onscreen prompts to configure 
the speakers.
8.Remove and recently installed hardware or software.
9.Restore system and file settings from a known good date using System Restore. 
If the issue is not fixed, repeat the preceding steps and select an earlier time and date.
10.Reinstall the Operating System.
11 .If the Issue is still not resolved, see “Online Support Information” on page 209. 
						

							158Chapter 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 Show Disabled Devices (clear by default). 
3.The microphone appears on the Recording tab. 
4.Right-click on the microphone and select Enable.
5.Select the microphone then click Properties. Select the Levels tab.
6.Increase the volume to the maximum setting and click OK.
7.Test the microphone hardware:
a.Select the microphone and click Configure.
b.Select Set up microphone.
c.Select the microphone type from the list and click Next.
d.Follow the onscreen prompts to complete the test.
8.If the Issue is still not resolved, see “Online Support Information” on page 209. 
						

							Chapter 4159
HDD Not Operating Correctly
If the HDD does not operate correctly, perform the following actions one at a time to correct the problem. 
1.Disconnect all external devices.
2.Run a complete virus scan using up-to-date software to ensure the computer is virus free. 
3.Run the Windows Vista Startup Repair Utility:
a.insert the Windows Vista Operating System DVD in the ODD and restart the computer. 
b.When prompted, press any key to start to the operating system DVD. 
c.The Install Windows screen displays. Click Next. 
d.Select Repair your computer. 
e.The System Recovery Options screen displays. Click Next. 
f.Select the appropriate operating system, and click Next. 
NOTE: Click Load Drivers if controller drives are required. 
g.Select Startup Repair. 
h.Startup Repair attempts to locate and resolve issues with the computer.
i.When complete, click Finish. 
If an issue is discovered, follow the onscreen information to resolve the problem.
4.Run the Windows Memory Diagnostic Tool. For more information see Windows Help and Support.
5.Restart the computer and press F2 to enter the BIOS Utility. Check the BIOS settings are correct and that 
CD/DVD drive is set as the first boot device on the Boot menu.
6.Ensure all cables and jumpers on the HDD and ODD are set correctly.
7.Remove any recently added hardware and associated software.
8.Run the Windows Disk Defragmenter. For more information see Windows Help and Support.
9.Run Windows Check Disk by entering chkdsk /r from a command prompt. For more information see 
Windows Help and Support.
10.Restore system and file settings from a known good date using System Restore. 
If the issue is not fixed, repeat the preceding steps and select an earlier time and date.
11 .Replace the HDD. See “Disassembly Process” on page 58. 
						

							160Chapter 4
ODD Failure
If the ODD fails, perform the following actions one at a time to correct the problem. Do not replace a non-
defective FRUs:
ODD Not Operating Correctly
If the ODD exhibits any of the following symptoms it may be faulty:
•Audio CDs do not play when loaded 
•DVDs do not play when loaded 
•Blank discs do not burn correctly 
•DVD or CD play breaks up or jumps 
•Optical drive not found or not active: 
•Not shown in My Computer or the BIOS setup 
•LED does not flash when the computer starts up 
•The tray does not eject
•Access failure screen displays
•The ODD is noisy
Perform the following general solutions one at a time to correct the problem.
1.Reboot the computer and retry the operation.
2.Try an alternate disc.
3.Navigate to Start´ Computer. Check that the ODD device is displayed in the Devices with Removable 
Storage panel.
4.Navigate to Start´ Control Panel´ System and Maintenance´ System´ Device Manager.