Troubleshooting
47
6
3. Type
spiftest D=sb
n T=4
and press Return.
For
n
, type the number of the Serial Parallel Controller card you wish to
test. For example, if the problem is with the first or second card, use
D=sb1
or
D=sb2
, respectively.
This command runs a data loopback test on all ports on the card. If the test
reports any errors, the most likely cause is faulty components on the card
(data drivers or receivers). You must replace the card.
Patch Panel and Cable Problems
If you suspect that the problem concerns the 96-pin cable or patch panel,
determine whether the problem is the cable or patch panel.
To determine which is the problem:
1. Quit processes using the ports.
Processes using the ports might interfere with the diagnostic programs that
test the ports for correct operation.
2. Disconnect the terminal or printer cable from the patch panel.
3. If all ports cannot communicate with terminals or printers, determine
whether the card is the problem.
See “Serial Parallel Controller Card Problems” earlier in this chapter.
4. If the card passes both tests in that section, the problem might be a faulty
96-pin cable or patch panel.
5. Replace the 96-pin cable.
6. If the problem continues, replace the patch panel.
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