Display Self-Test

Display Self-Test

Before performing this test, be sure you are familiar with the information under 'Display Considerations'.


Before replacing a display, check the following

If the screen is rolling, replace the display assembly.
If that does not correct the problem, replace FRUs in the following order until the problem goes away:
  1.  Display adapter (any type)
  2.  System board
  3.  Bus adapter (if used)

If the screen is not rolling, do the following:
  1.  Power-off the computer and display.
  2.  Disconnect the display signal cable.
  3.  Power-on the display.
  4.  Turn the contrast to its maximum position.
  5.  Turn the brightness control to the center (or maximum) position.

Check for the following conditions:

NOTE: 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 FRUs, in the following order, until the problem goes away:

NOTE: Certain adapter failures can cause video problems. Before replacing any FRUs, remove any option adapters to see if the problem disappears.

  1.  Display adapter (any type)
  2.  System board
  3.  Bus adapter (if display adapter is used)
  4.  Display

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.

A noticeable odor might occur on new displays or displays recently removed from storage.
These sounds, display patterns, and odors are normal, do not replace any parts.

If you are unable to correct the problem, go to 'Undetermined Problem'.

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