IBM PS/2 CL57 SX Hardware Maintenance Reference page 8

IBM PS/2 Model CL57 SX HMS
How to Diagnose Combined FRUs
1.2 How to Diagnose Combined FRUs
If an adapter or device consists of more than one FRU, an error code may
be caused by any of the FRUs. Before replacing the adapter or device,
remove the FRUs, one by one, to see if the symptoms change.
¦ Copyright IBM Corp. 1992
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