IBM RT PC 10 Hardware Maintenance And Service page 130

Step 7
One of the boards removed from slots B or D is failing.
1.
Set the power switch on the system unit to Off.
2. Install one of the boards removed from slots B or D.
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.
II
I
II
LJ
I
II
II
I
LJ..J
IS "03" OR "05" DISPLAYED IN THE TWO-DIGIT DISPLAY?
NO Repeat this procedure.
YES Set the power switch on the system unit to Off.
1. The last board installed is failing, exchange the failing board.
2. Go to "Step 8" on page 3-86.
Problem Isolation Charts 3-85