IBM PCjr

You should have already replaced the 64KB memory
and display expansion.
1. Replace the system board.
2. Reattach the original 64KB memory and display
expansion.
3. Perform advanced POST.
DID YOU GET AN ADVANCED POST ERROR
MESSAGE?
The problem has been corrected.
Repeat advanced POST and the advanced
tests to ensure that the IBM PCyr is operating
correctly.
The original 64KB memory and display
expansion is bad. Replace it.
Repeat advanced POST and the advanced
tests to ensure that the IBM VCjr is operating
correctly.
3-200-2 Memory