IBM 6151 Maintenance And Service Manual page 73

Step 14
Look at the display.
THERE IS A HARDWARE PROBLEM IN YOUR MACHINE. DlAG-2
The Service Request Number is:
WRITE .....doWD the above number.
RETURN .... to the HarowlU'e Maintenance and Service Manual.
DID
THE REPAIR CHECKOUT RESULT IN AN SRN?
YES The SRN displayed is the repair checkout results.
1. Record the SRN displayed.
2. Go to "Step 16" on page 3-0010-17.
NO Go to "Undetermined Problem PIC 9860" on page 3-9860-1.
Use the Repair Checkout procedure as the failing test
procedure.
(6/88) Problem Isolation Charts 3-0010-15