Led Indicators - Supermicro SuperServer 420GH-TNGR User Manual

4.4 LED Indicators

Onboard Power LED
The Onboard Power LED is located at PWR_LED on the motherboard. When this LED is
on, the system power is on. Be sure to turn off the system power and unplug the power cord
before removing or installing components. Refer to the table below for more information.
BMC LED
BMC_LED is the BMC heartbeat LED. When the LED is blinking green, BMC is functioning
normally. Refer to the table below for the LED status.
Unit ID LED
The Unit ID LED is located at UID_LED on the motherboard. When you press the UID switch
(JUID1), the UID LED indicator will be turned on. Press the UID switch (JUID1) again to turn
off the LED indicator. The UID Indicator provide easy identification of a system unit that may
be in need of service.
Onboard Power LED Indicator
LED Color Definition
System Power Off
Off (power cable not
connected)
Green System Power On
BMC Heartbeat LED Indicator
LED Color Definition
System Power Off
Off (power cable not
connected)
Green System Power On
Unit ID LED Indicator
LED Color Definition
Blue: On Unit Identified
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Chapter 4: Motherboard Connections