IBM PCjr

1. Replace the system board.
2. Reattach the original infra-red receiver.
3. Perform advanced POST.
The IBM Personal Computer Basic
Version 01.20 Copyright IBM Corp.1981
XXXXX Bytes free
OK
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DID ADVANCED POST SUCCESSFULLY
COMPLETE?
The problem has been corrected. Repeat
advanced POST and the advanced tests to
ensure that the IBM PCyr is operating
correctly.
You have finished the keyboard PIC. If you
still have an unsolved problem, you should
seek technical assistance.
3-300-4 Keyboard