IBM 6151 Maintenance And Service Manual page 177

Unresolved Problem PIC 0060
Use this PIC for problems that still fail after all of the FRUs in the
SRN have been exchanged.
Step 1
This problem may be caused by a defective cable. Look at the
SRN.
4. Write the Service Request Number here:
13-_ _
AJZB175
DOES THE SRN CONTAIN THE SRA NUMBERS OF TWO
FRUs THAT ARE CONNECTED BY A CABLE THAT HAS
NOT BEEN EXCHANGED (such as a fixed-disk adapter and
the fixed-disk drive)?
NO Go to "Step 3" on page 3-0060-3.
YES Continue on the next page.
(6/88) Problem Isolation Charts 3-0060-1