IBM PS/1, Hardware Maintenance Service

Page: 149 / 304

070 (continued)
IS THE VIDEO MEMORY SIZE INDICATED 512KB?
Yes No
071
Replace the system board.
072
Replace the video memory.
073
– Press Esc.
– Press 0 (SYSTEM CHECKOUT), then press Enter.
Note: Do not run the individual tests until you are instructed to do so by
this MAP.
– Press Y or N as required when questions about installed devices appear
on the screen.
– Select the RUN TESTS ONE TIME option from the system checkout
menu.
– Type 24 (VIDEO GRAPHICS ARRAY), then press Enter.
The image on the screen may be distorted, or the characters may be the
wrong size.
Note: You may have to refine the display controls to obtain the best image.
IS THE IMAGE ON THE SCREEN DISTORTED OR THE WRONG SIZE?
Yes No
074
Go to Step 076 on page 2-112.
075
Replace the display. If the symptom remains, replace the system board.
076
(Step 076 continues)
Diagnostic Information
2-111