IBM PCjr

4. Set the system unit's Power switch to On.
5. Bring the advanced-test menu to your screen.
ARE THE IDS UNDER THE GRAPHICS PRINTER
SYMBOL BLINKING?
The system board is bad. Replace it.
Reattach the original parallel printer
attachment (attachment #1).
Repeat advanced POST and the advanced
tests to ensure that the IBM PCyr is operating
correctly.
The problem has been corrected. Repeat
advanced POST and the advanced tests to
ensure that the IBM PCyr is operating
correctly.
Parallel Printer Attachment 3-900-13