User Manual

4-6 Troubleshooting
2. Make sure the computer has power by checking for one of the following:
Fans start up
Status LEDs illuminate
If there is no power, refer to the “Power On Issues” section on page 4-4.
3. Drain stored power by removing the power cable and the battery pack. Hold the power
button for 10 seconds.
4. Connect the power cable and reboot the computer.
5. Connect an external monitor to the computer and switch between the internal display and
the external display by pressing Fn+F5.
6. If the POST or video appears on the external display only, refer to the “LCD Failure”
section on page 4-8.
7. Disconnect power and all external devices including port replicators or docking stations.
8. Remove the lower case. Perform the “Removing the Lower Case” procedures described
on pages 3-9.
9. Remove the mainboard. Perform the “Removing the Mainboard” procedures described on
pages 3-17.
10. Remove the memory module. Perform the “Removing the Memory Modules” procedures
described on pages 3-32.
11. Start the computer. If the computer boots correctly, add the devices one by one until the
failure point is discovered.
12. Reinstall the memory module. Perform the “Replacing the Memory Module” procedures
described on pages 3-62.
13. If the issue is still not resolved, refer to the Online Support Information on page 8-3.
Abnormal Video 0
If the video appears abnormal, perform the following one at a time.
1. Boot the computer.
If permanent vertical/horizontal lines or dark spots appear in the same location, the LCD
panel is faulty and should be replaced. The same goes for when there is extensive pixel
damage (i.e. different colored spots in the same locations on the screen). Perform the
“Removing the Upper Case” and “Removing the LCD Panel” procedures described on
pages 3-39 and 3-44 respectively.
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.