IBM 5150 Hardware Maintenance Manual page 21

1. Insert your Advanced Diagriostic diskette or cassette.
2. Plug the System Unit power cord into a properly
functioning, grounded wall outlet.
3. Position the System Unit Power switch to the On
position and listen for the power supply fan.
Note: If the system works properly except for the fan not
running; replace the power supply (see Section 3, "Removal!
Replacement").
IS THE POWER SUPPLY FAN RUNNING?
NO
Check the System Unit power cord for continuity
and replace it if necessary. Go to PIC 020, "Power".
YES
010-4