Digital Equipment DECconcentrator 500, Installation Manual, Page: 72 / 98

Problem Solving 5–3
5.3 Running the Self-Test
To run the self-test:
1. Disconnect the power from the DECconcentrator 500.
2. Reconnect the power to start the self-test.
NOTE
If any ports have been disabled by remote manage-
ment (DECelms and DECmcc), the LEDs may not
light as indicated in these procedures. The Network
Management Card switches must be set to the default
parameters in order to test all ports. If you are rein-
stalling the unit, make sure you enable switch 1 (the
reset to default settings switch). Refer to your Op-
tion Card Installation manual.
The DECconcentrator 500 self-test runs for approximately 15 seconds. Observe the
power, fan, and controller/backplane LEDs to make sure the concentrator is opera-
tional. After self-test is complete, the port LEDs blink green.
If no fault occurs, operational firmware takes control of initializing the DECconcen-
trator 500. If there is a non-fatal fault, the operational firmware decides whether to
continue or to abort the initialization of the DECconcentrator 500.
Section 5.4 describes what to do if the LED display is not normal.