Led Indicators - Supermicro SuperServer SYS-421GE-TNHR2-LCC User Manual

4.5 LED Indicators

Onboard Power LED
The Onboard Power LED is located at LEDPWR 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 cords
before removing or installing components. Refer to the table below for more information.
BMC Heartbeat LED
A BMC Heartbeat LED is located at LEDBMC on the motherboard. When LEDBMC is blinking
green, the BMC is functioning normally. Refer to the layout below for the location of LEDBMC.
M.2 LED Indicators
Two M.2 LED indicators are located at LED4 and LED7 on the motherboard. When LED4 is
blinking, the bottom M.2 device functions normally. When LED7 is blinking, the top M.2 device
functions properly. Refer to the layout below for locations of LED4 and LED7.
Onboard Power LED Indicator
LED Color Definition
Off System Power Off (power cable not connected)
Green System Power On
BMC Heartbeat LED State
LED Color
Green: Blinking
M.2 LED State
LED Color
Green: Blinking
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Chapter 4: Motherboard Connections
Definition
BMC Normal
Definition
M.2 device working