IBM 6151 Maintenance And Service Manual page 408

Step 10
One of the removed boards or adapters is failing.
1.
Set the power switch on the system unit to Off.
2. Install one of the boards, adapters, or options.
3. If the adapter has a device attached to it, set the power switch
on the device to On.
4. Be sure the power has been off 30 seconds; then set the power
switch on the system unit to On.
5.
Try
the failing procedure.
DID THE SAME PROBLEM OCCUR?
NO Repeat the above steps.
YES
Continue on the next page.
3-9860-10 Service Manual