Appendix C Status Indicator LEDs C-5
C.2 Internal Status Indicator LEDs
These servers have internal status indicator LEDs for the fan modules, the DIMM
slots, the CPUs, and the GRASP board.
FIGURE C-3 shows the locations of the internal LEDs. TABLE C-5 describes the LED
behavior.
TABLE C-4 Back Panel LED Functions
LED Name Description
Rear Fan Tray Fault LED
(The rear fan tray and the LED
are present only in Sun Fire
X4200/X4200 M2 servers.)
This LED has two states:
• Off: Fan module is operating properly.
• On (amber): Fan tray has failed.
Power Supply Status LEDs The power supplies have three LEDs:
• Top LED (green): Power supply is operating properly.
• Middle LED (amber): Power supply failed.
• Bottom LED (green): Power supply is operating properly.
Locate button/LED
(Same function as on front
panel.)
This LED helps you identify which system in the rack you
are working on in a rack full of servers.
• Push and release this button to make the Locate LED
blink for 30 minutes.
• Hold down the button for 5 seconds to initiate a “push-to-
test” mode that illuminates all other LEDs for 15 seconds
both inside and outside of the chassis.
Service Action Required LED
(Same function as on front
panel.)
This LED has two states:
• Off: Normal operation.
• Slow Blinking: An event that requires a service action has
been detected.
Power/OK LED
(Same function as on front
panel.)
This LED has three states:
• Off: Server main power and standby power are off.
• Blinking: Server is in standby power mode, with power
applied to only the GRASP board and the power supply
fans.
• On: Server is in main power mode with power supplied
to all components.
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