IBM 3745 Problem Determination Manual page 262

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Problems on One Line Only (LlC1 to LlC4)
11
Perform this step only after successful wrap tests.
Compare the information displayed in
II
of the preceding screen with the cable
type installed on the machine. (Refer to the plugging diagrams or cable labels to
determine the cable type.)
1. If there is a mismatch, suspect the cable.
a. Swap the cable with another one of the same type.
b.
§J
to perform a refresh of the LID screen.
c. If displayed parameters are now correct, the cable was faulty, replace it.
2. If the cable is correct, suspect the L1C.
a. Replace the L1C by another one of the same type.
b.
§]
to perform a refresh of the LID screen.
c. If displayed parameters are now correct, the L1C was faulty, replace it.
3. If the problem persists:
CO
Chapter 9. LlC and Line Problems (LSS)
9-11