IBM RT PC 10 Hardware Maintenance And Service page 135

Step 4
One of the adapters or boards removed is failing.
1. Set the power switch on the system unit to Off.
2. Install one of the adapters or boards. Use the following order; the
fixed-disk and diskette drive adapter, the display adapter, then any other
adapter.
3. Be sure the power has been off 30 seconds, then set the power switch
on the system unit to On.
4. Wait two minutes, then answer the following question.
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II
II
_II I
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3-90
Service Manual
IS "00," "04," OR "07" DISPLAYED IN THE TWO-DIGIT DISPLAY?
NO Repeat the above steps.
YES
Set the power switch on the system unit to Off.
1. The last board installed is failing, exchange the failing board.
2. Continue on the next page.