Technical information

1.2.2 Self-Test

The self-test checks for a full white display screen. The white screen

will have black borders of various thickness on one or all sides depending

on which display you are servicing.

1. Power off the display.

2. Disconnect the signal cable.

3. Power on the display.

Note: The display must be powered on for five minutes before starting

the test.

4. Set the contrast and brightness controls to maximum.

5. The self-test pattern on the screen should be a full white raster (a

pattern of horizontal scanned lines) with a black border.

6. If the self-test pattern does not appear correctly, go to "Basic

Function and Pattern Checks and Adjustments" in topic 1.2.3.

7. If the self-test raster appears correctly, the video problem may be

caused by the system unit, the display signal cable, or connection.

Connect the display to another system unit to test the video problem,

then proceed to the function and pattern checks and adjustments for

the specific display you are servicing.

PICTURE 4

Figure 2-1. Typical Self-Test Pattern

Note: There are two fine transverse black lines across the screens of

8517/9517 Displays. These are part of the normal background for these

displays.

PS/2 Displays Maintenance Manual

Self-Test

1.2.2 - 1