Sun Microsystems Ultra Enterprise 4000 Systems, System Installation Manual

Page: 60 / 72

3-14 Ultra Enterprise 6000/5000/4000 Systems Installation Guide—November 1996
3
Figure 3-8 System Status LEDs (Standalone Server)
Table 3-2 summarizes LED status indications.
After boot, check the status of the system by inspecting system status LEDs on
the front panel. See Table 3-2 and Figure 3-8.
Ideally, when self test completes, both top and bottom LEDs are on. Less ideal
is if all LEDs are on (system needs service, but is able to run). The worst
condition is if the top and middle LEDs are on (system cannot boot), or if no
LED is on.
Table 3-2 Front Panel LED System Status
LED Position Condition
Top LED (green) On — The power supply is delivering DC power.
Middle LED
(yellow) Flashing — (first 60 seconds of AC power) Self tests are running.
Off — (after self tests end) No hardware failures detected.
On — (after self tests end) Hardware failure was detected.
Bottom LED
(green) Off — (first 60 seconds of AC power) Self tests are running.
Flashing — (after self tests end) System is running.
Off — (after self tests end) System cannot run; repair is needed.
DC power (green)
Fault (yellow)
System running
(green)