IBM PCjr Hardware Maintenance And Service

1. Set the system unit's Power switch to Off, wait five
seconds, and then set the Power switch to On.
2. Wait untU you hear one beep.
3. If a diskette drive is attached, wait for its red Ught
to switch on and then off.
4. Press and hold the Ctrl and Alt keys.
5. While still holding the Crtl and Alt keys, press the
Ins key.
6. Release all keys immediately.
7. Wait until
you hear one beep.
8. Press the Ins key three times.
9. Press the Enter key once.
CONTINUE
3-500-40 Display

IBM PCjr Specifications

General

Brand	IBM
Model	PCjr
Category	Desktop
Language	English