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LED Location
LED
Front Panel
Left LED (green)
Middle LED
(yellow)
Right LED (green)
Status LEDs
All boards
(yellow, marked 0-7)
on all system boards
OBP master board
DC power (green)
Fault (yellow)
System running (green)
Figure 4-5
System Status LEDs
Table 4-1 summarizes LED status indications.
Table 4-1
LED Status Indicators
Condition
On — DC power supply is receiving AC current.
Off — There is no DC power.
On — (first 60 seconds) Self-tests are running.
Off — (after self-tests end) No hardware failures.
On — (after self-tests end) Hardware failure was detected.
Off — (first 60 seconds) Self-tests are running.
On — (after self-tests end) System is running.
Off — (after self-tests end) System cannot run; repair is needed.
LEDs cycle on and off in irregular pattern during POST.
If no OBP master has been selected, LEDs will flash on one board after POST.
(The system will pause indefinitely until you make a selection.)
After POST ends, LEDs display cyclic pattern.
Powering the System On and Off
4
4-7
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