Diagnostic Leds On Ocp; Led Patterns During Power-Up (Rack Orientation) - Compaq AlphaServer DS20E Reference Manual

8.2

Diagnostic LEDs on OCP

Diagnostic LEDs on the operator control panel light up during power-
up, indicating the internal process of the system and console.
LEDs shut off on successful completion of power-up self-tests. In a
rackmount system, LED 1 is at the top. In a pedestal system LED 1 is to
the left.
Figure 8–1 LED Patterns During Power-Up (Rack Orientation)
LED1
LED2
LED3
LED4
= On, = Off
If the system fails to complete the power-up, and some LEDs remain lit, refer to
Figure 8–1 to determine what part of the power-up sequence is failing.
NOTE: The first two LED patterns (LEDs 1-4 on, followed by LEDs 1-3 on and
LED 4 off) are identical to the last two patterns, but represent different
startup phases. Observe the LED pattern on power-up to ensure that
the first two patterns execute successfully. If power-up does not succeed,
and a LED pattern is lit that is the same as one of the first two patterns,
the problem lies with one of the last two phases of the power-up
sequence.
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Troubleshooting 8-3
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