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2.
Open the computer card cage door and observe the selftest LEOs (see Figure
4-1 for the locations of the LEOs). Note whether the LEOs indicate normal
activity or whether the ST
/*
LEO is blinking slowly and LEOs
H
through N
are displaying a steady pattern. If a steady pattern is being displayed by
LEOs H through N, make a written record of which LEOs are lit. (This
·information may be needed later if the problem is intermittent.)
3.
Press the LANIC TEST RESET switch (see Figure 4-1) to initiate the self test.
4.
Observe the selftest LEOs. Refer to Table 4-1 for the meanings of the
various LEO patterns. If the self test completes with no errors. the selftest
LEO (ST /*) will be on and LEOs H through N will be off (a code of all
zeros) for a period of five seconds. After five seconds. the ST
/*
LEO will go
off and LEOs H through N will reflect activity on the LANIC. If the self
test fails, the code of the test that failed will be displayed by LEOs H
through N and the ST
/*
LEO will blink slowly for at least 20 seconds
(allowing time for the code to be noted).
5.
If the LANIC fails self test. except as noted below. replace the LANIC card
in accordance with the procedures given in Chapter 2. Re-run the self test
after the new card is installed. If the new card passes self test and there still
appears to be a problem on the network. run the LAN diagnostic (it is
possible for the LANIC to pass self test and still not be functioning properly).
The diagnostic tests more of the LANIC card circuitry and also tests the A VI
and MAU. Refer to the LA N / 3000 Diagnostic and Troubleshooting Guide.
part number 30242-90003. for information on running the LAN diagnostic.
NOTE
The last test of the test sequence (2E. Loopback on Medium) requires that
the ThinMAU be connected to the LANIC. If it is not connected to the
LANIC. the last test will report a failure. The LANIC. however. may not
be defective in this case.
6.
If an intermittent problem is suspected. the self test may be looped by
holding the LANIC TEST RESET switch in with an alligator clip. The self
test will then loop until a failure is detected. and will preserve the failure
code as described in step 4 as long as the switch remains in.
7.
If the self test completes with no error indications. the LAN/3000 diagnostic
must also be run to completely check the LANIC. AUI cable. and MAU.
Run the diagnostic as described in the LA N /3000 Diagnostic and
Troubleshooting Guide. part number 30242-90003.
Maintenance
4-3
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