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DECserver 900GM Installation
13
Problem Solving Using the LEDs
When diagnosing a problem with the module, note that the problem is often
indicated by the combined states of the module’s LEDs. Table 2 lists the states of
the LEDs for various error conditions that can occur during initial installation of the
device, along with probable causes and steps you can take to correct the condition.
Normal Powerup
When power to the module is initially turned on, the following events occur:
1. The Power LED lights and remains lit. All other LEDs light and then turn off.
This verifies that the individual LEDs are operational.
2. The module initiates its built-in self-test.
3. After the self-test completes successfully (within approximately 2 minutes),
the Module OK LED lights and remains lit.
4. The remaining LEDs indicate their operational status as described in Table 2.
Problem Solving
Table 2 lists probable causes and corrective actions you can take if the module
LEDs do not function properly.