If the screen is rolling, replace the external monitor. If that does not correct the problem, replace the FRUs in the following order:
NOTE: The location of the test margin may vary with the type of monitor. It can be either at the top and/or bottom, or left and/or right of the screen.
If you do not see a test margin on the screen, replace the monitor. If there as a test margin on the screen, replace the system board.
Please see the LEGAL - Trademark notice.
Feel free - send a for any BUG on this page found - Thank you.