IBM 5150 Hardware Maintenance Manual page 90

Set the System Unit Power switch to Off and connect your
display cable to the System Unit connector. Insert your
Advanced Diagnostic diskette or cassette. Set the System
Unit Power switch to On. You will use an audio response to
guide you through the diagnostics. Press the following keys in
the sequence listed and listen for the "beep" each time you
press
~
(Enter). If you are using cassette diagnostics,
go to page 010-9, complete the instructions on that page;
return to this page and continue with step 2.
Use the numbers on the top row of the keyboard; do not use
the numeric keypad.
STEPS
1.
Run Diagn osti cs
~
•
Enter (Beep)
2.
~
3.
g
Are the options correct? (YES).
4~
Enter (Beep)
5.
[9
Run Test
6~
Enter (Beep)
Enter the number of option to test.
7.
q!!J
Color/Graphics Adapter
8.
tJ
Enter (Beep)(Beep)
WERE YOU ABLE TO COMPLETE THIS AUDIO RESPONSE
DIAGNOSTICS BY PRESSING THE ABOVE SEQUENCE
OF KEYS?
NO
You may have a power supply or connector problem.
Check your connectors or go to PIC 020, "Power."
YES
500-19