IBM PCjr

Light Pen
You are entering this PIC because you have problems
when using a light pen.
Note: Do the Display advanced-test before doing
the Light Pen advanced-test.
1. Set the system unit's Power switch to Off.
2. Plug the light pen into system unit connector LP.
3. Set the system unit's Power switch to On.
4. Bring the advanced-test menu to your screen.
5. Move the cursor to ID "5" under the display
symbol.
6. Press the Enter key.
You have a white screen with a yeUow square in the
upper left corner.
Connector LP <
CONTINUE
.'01(2)'
^Light
Pen Plug
Light Pen 3-800-1