IBM PCjr Hardware Maintenance And Service

3. Set the system unit's Power switch to On.
4. Wait one minute.
DID YOU HEAR ONE BEEP?
3-020-2 Power
One of the detached devices is failing.
Reconnect the devices one at a time. Perform
advanced POST after each reconnection.
(Attach the connector for television first to
test it, then attach the television). When the
failing symptom returns, replace the device
that is causing the failure.
Repeat advanced POST and the advanced
tests to ensure that the IBM PCyr is operating
correctly.

IBM PCjr Specifications

General

Brand	IBM
Model	PCjr
Category	Desktop
Language	English