IBM PCjr

I
Press the Ins key once.
Video page 0 should be on your screen.
Press the Ins key seven times to scroll through the video
pages 0 through 7. Look for any discrepancy in the
hstings of numbers on each page.
WERE ALL VIDEO PAGES DISPLAYED
CORRECTLY?
The system board is bad. Replace it.
Repeat advanced POST and the advanced
tests to ensure that the IBM PCyr is operating
correctly.
Display 3-500-19