IBM RT PC 10 Hardware Maintenance And Service page 147

Step 3
One of the removed adapters is failing.
1. Set the power switch on the system unit to Off.
2. Install one of the adapters.
3. Be sure the power has been off 30 seconds, then set the power switch
on the system unit to On.
4. Wait four minutes, then answer the following question.
DIAGNOSTIC OPERATING INSTRUCTIONS
DIAG-l
3-102 Service Manual
This diskette contains diagnostics and utilities for your system. You
should use these procedures whenever you are having problems with your system
which have not been corrected by any software application procedures available.
In general, the procedures will run automatically. However, sometimes you will
be required to select options, tell the system when to continue, do simple
tasks, and exchange di skettes.
ARE THE "DIAGNOSTIC OPERATING INSTRUCTIONS" DISPLAYED
CORRECTLY?
YES Repeat the above steps.
NO Set the power switch on the system unit to Off.
1. The last adapter installed is failing, exchange the failing
adapter.
2. Continue on the next page.