IBM System 9000 Troubleshooting And Servicing page 39

1 .
Perform fault isolation procedures suggested by the manufacturer of
the peripheral device .
2 .
If Step 1 does not isolate the fau l t , perform the optional check for
the auxil iary I / O port that is connected to the malfunctioning pe­
See Section 3 . 1 2 , "Auxi l iary I/O Port Checks . "
ripheral .
I f Step 1 or 2 does not isolate the source of the problem, verify
3 .
the integrity of the interconnecting cabling.
Checks . "
See Chapter 4 , " Cable
Fault Detection 2 - 24