4-6
Troubleshooting
4.
Connect the power and reboot the computer.
5.
Connect an external monitor to the computer and switch between the internal
display and the external display is by pressing
Fn+F5
.
6.
If the POST or video appears on the external display only, refer to
LCD Picture Failure
.
7.
Disconnect power and all external devices including port replicators or docking
stations. Remove any memory cards and CD/DVD discs.
8.
Start the computer. If the computer boots correctly, add the devices one by one until
the failure point is discovered.
9.
Reseat the memory modules.
10. Remove the drives (refer to
Maintenance Flowchart
).
11. If the Issue is still not resolved, refer to
Online Support Information
.
Abnormal Video
0
If the video appears abnormal, perform the following:
1.
Boot the computer.
If permanent vertical/horizontal lines or dark spots appear in the same location,
the LCD is faulty and should be replaced. Refer to Disassembly Process.
If extensive pixel damage is present (different colored spots in the same locations
on the screen), the LCD is faulty and should be replaced. Refer to
Maintenance
Flowchart
.
NOTE:
NOTE
:
Make sure that the computer is not running on battery alone as this may reduce
display brightness.
2.
Adjust the brightness to its highest level. Refer to the User Manual for instructions on
adjusting the settings. If the display is too dim at the highest brightness setting, the
LCD is faulty and should be replaced. Refer to
Disassembly Process
.
3.
Check the display resolution is correctly configured:
Minimize or close all Windows.
If display size is only abnormal in an application, check the view settings and
control/mouse wheel zoom feature in the application.
If desktop display resolution is not normal, right-click on the desktop and select
Personalize Display Settings
.
Click and drag the Resolution slider to the desired resolution.
Click
Apply
and check the display. Readjust if necessary.
4.
Roll back the video driver to the previous version if updated.
5.
Remove and reinstall the video driver.
6.
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
7.
If the Issue is still not resolved, refer to
Online Support Information
.
8.
Run the
Windows Memory Diagnostic
from the operating system DVD and follow the
on-screen prompts.
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Summary of Contents for Aspire 4739Z
Page 1: ...Aspire 4739Z SERVICEGUIDE Downloaded from www Manualslib com manuals search engine ...
Page 10: ...x Downloaded from www Manualslib com manuals search engine ...
Page 11: ...CHAPTER 1 Hardware Specifications Downloaded from www Manualslib com manuals search engine ...
Page 14: ...1 4 Downloaded from www Manualslib com manuals search engine ...
Page 57: ...CHAPTER 2 System Utilities Downloaded from www Manualslib com manuals search engine ...
Page 88: ...3 4 Downloaded from www Manualslib com manuals search engine ...
Page 130: ...3 46 Machine Maintenance Procedures Downloaded from www Manualslib com manuals search engine ...
Page 131: ...CHAPTER 4 Troubleshooting Downloaded from www Manualslib com manuals search engine ...
Page 162: ...5 8 Jumper and Connector Locations Downloaded from www Manualslib com manuals search engine ...
Page 184: ...6 22 FRU Field Replaceable Unit List Downloaded from www Manualslib com manuals search engine ...
Page 186: ...1 2 Acer Aspire 4739Z 7 1 Downloaded from www Manualslib com manuals search engine ...
Page 203: ...CHAPTER 8 Test Compatible Components Downloaded from www Manualslib com manuals search engine ...
Page 213: ...CHAPTER 9 Online Support Information Downloaded from www Manualslib com manuals search engine ...
Page 214: ...9 2 Introduction 9 3 Downloaded from www Manualslib com manuals search engine ...
