If the screen is rolling, replace the display assembly. If that does not correct the problem, replace the video adapter (if installed) or replace the system board.
If the screen is not rolling, do the following to run the display self-test:
The location of the test margin varies with the
type of display. The test margin might be on the
top, bottom, or one or both sides.
If you do not see any test margin on the screen, replace the display. If there is a test margin on the screen, replace the video adapter (if installed) or replace the system board.
Note: During the first two or three seconds after the display is powered on, the following might occur while the display synchronizes with the computer.
If you are unable to correct the problem, go to Undetermined Problems.
Please see the LEGAL - Trademark notice.
Feel free - send a for any BUG on this page found - Thank you.