Acer Aspire One Model Nav Service Guide

							Chapter 4111
Internal Microphone Failure
If the internal Microphone fails, perform the following actions one at a time to correct the problem. Do not 
replace 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 213.
Start
Check M/B 
Mic cable 
Re -a s s emble  
the MIC  cable 
to M/B
OK
NG
Check MIC 
wire of  LCD 
module
OK
Swap MIC wire 
of LCD module 
OK
NG
Swap M/B 
						

							11 2Chapter 4
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 40. 
						

							Chapter 411 3
USB Failure (Rightside)
If the rightside USB port fails, perform the following actions one at a time to correct the problem. Do not 
replace non-defective FRUs:
Start
Check IO/B
to M/B 
CONN
Re-assemble 
the IO/B 
CONN to M/B
OK
NG
Check IO/B 
OK
Swap IO/B
OK
NG
Swap M/B 
						

							11 4Chapter 4
Wireless Function Test Failure
If the wireless function test fails, perform the following actions one at a time to correct the problem. Do not 
replace non-defective FRUs:
Start
Check WL 
antenna to 
WL card
Re -a s s emble  
the antenna to 
WL card
OK
NG
Check 
antenna
OK
Swap The 
antenna
OK
NG
Swap M/B
Check WL 
card
OK
Swap the WL 
card
OK
NG 
						

							Chapter 411 5
3G Function Test Failure
If the 3G function test fails, perform the following actions one at a time to correct the problem. Do not replace 
non-defective FRUs:
Start
Check 3G
antenna to 
3G card
Re -a s s emble  
the antenna to 
3G card
OK
NG
Check 
antenna
OK
Swap The 
antenna
OK
NG
Swap M/B
Check 3G
card
OK
Swap the 3G
card
OK
NG 
						

							11 6Chapter 4
Switch Failure
If the switches fail, perform the following actions one at a time to correct the problem. Do not replace non-
defective FRUs:
Start
Check IO/B 
to M/B FFC 
Re-assemble 
the IO/B  FFC
to M/B
OK
NG
Check IO/B  
and FFC
OK
Swap The IO/B
OK
NG
Swap M/B 
						

							Chapter 411 7
Thermal Units Failure
If the thermal units fail, perform the following actions one at a time to correct the problem. Do not replace non-
defective FRUs:
Power Button Failure
If the Power Button fails, perform the following actions one at a time to correct the problem. Do not replace 
non-defective FRUs:
START
Fan power
cable w ell
connected?Connect it  w ellNo
Fan OK?NoReplace fan
NoS eat it w ell
Replace M/B
CPU
H eat sink w ell
seated? 
						

							11 8Chapter 4
External Mouse Failure
If an external Mouse fails, perform the following actions one at a time to correct the problem. 
1.Try an alternative mouse.
2.If the mouse uses a wireless connection, insert new batteries and confirm there is a good connection. See 
the mouse user manual.
3.If the mouse uses a USB connection, try an alternate USB port.
4.Try an alternative program to verify mouse operation. Reinstall the program experiencing mouse failure.
5.Restart the computer.
6.Remove any recently added hardware and associated software.
7.Remove any recently added software and reboot.
8.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.
9.Run the Event Viewer to check the events log for errors. For more information see Windows Help and 
Support.
10.Roll back the mouse driver to the previous version if updated recently.
11 .Remove and reinstall the mouse driver.
12.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.
13.If the Issue is still not resolved, see “Online Support Information” on page 213.
Other Failures
If the CRT Switch, Dock, LAN Port, external MIC or Speakers, PCI Express Card, 5-in-1 Card Reader or 
Volume Wheel fail, perform the following general steps to correct the problem. Do not replace non-defective 
FRUs:
1.Check Drive whether is OK.
2.Check Test Fixture is ok.
3.Swap M/B to Try. 
						

							Chapter 411 9
Intermittent Problems
Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a 
hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement 
should be considered only when a recurring problem exists.
When analyzing an intermittent problem, do the following:
1.Run the advanced diagnostic test for the system board in loop mode at least 10 times.
2.If no error is detected, do not replace any FRU.
3.If any error is detected, replace the FRU. Rerun the test to verify that there are no more errors. 
Undetermined Problems
The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect, 
whether a short circuit is suspected, or whether the system is inoperative. 
Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).
NOTE: Verify that all attached devices are supported by the computer.
NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power On 
Issue” on page 104):
1.Power-off the computer.
2.Visually check them for damage. If any problems are found, replace the FRU.
3.Remove or disconnect all of the following devices:
• Non-Acer devices
• Printer, mouse, and other external devices
•Battery pack
• Hard disk drive
•DIMM 
• CD-ROM/Diskette drive Module
• PC Cards
4.Power-on the computer.
5.Determine if the problem has changed.
6.If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7.If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU:
• System board
• LCD assembly 
						

							120Chapter 4
Motherboard CMOS Discharge
If any problems such as incorrect CMOS settings, the CMOS data can be cleared by short-circuiting the 
CMOS jumpers. Remove the Back Cover and use a metal conductivity tool to short-circuit the jumpers near 
the DIMM Module.