IBM PCjr

I
4. Set the system unit's Power switch to On.
5. Bring the advanced-test menu to your display screen.
6. Movethe cursor to ID "5" under the display symbol.
7. Press the Enter key.
8. FoUow the light pen instructions and use the light
pen to erase the white.
DOES THE LIGHT PEN OPERATE AS DESCRIBED
ON PAGE 3-800-2?
The light pen is bad. Replace it.
Reattach the original system board.
Repeat advanced POST and the advanced
tests to ensure that the IBM PCjr is operating
correctly.
The problem has been corrected. Repeat
advanced POST and the advanced tests to
ensure that the IBM PCy>is operating
correctly.
Light Pen 3-800-5