Supermicro SuperServer SYS-221H-TNR - LED Indicators

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Chapter 4: Motherboard Connections
4.4 LED Indicators
BMC LAN LEDs
A dedicated BMC LAN connection is provided on the low-prole Slim SAS I/O connector
(JIO1) located on the rear side of the motherboard. The LED on the right indicates activity,
and the LED on the left indicates the speed of the connection. Refer to the table below for
more information.
BMC LLAN
Activity LEDLink LED
LAN 1/LAN 2
IPMI LAN
(X8ST3-F)
BMC LAN LEDs
Color/State Denition
Link (left)
Green: Solid
Amber: Solid
100 Mbps
1Gbps
Activity (Right) Amber: Blinking Active
Unit ID LED
The front UID LED indicator is located at LED1. This UID indicator provides easy identication
of a system that may need services.
UID LED
LED Indicator
LED Color Denition
Blue: On System Identied
Onboard Power LED
The Onboard Power LED is located at LEDPWR (LED2) on the motherboard. When this LED
is on, the system power is on. Be sure to turn o󰀨 the system power and unplug the power
cords before removing or installing components. Refer to the table below for more information.
Onboard Power LED Indicator
LED Color Denition
O󰀨 System Power O󰀨 (power cable not connected)
Green System Power On
BMC Heartbeat LED
A BMC Heartbeat LED is located at LEDBMC (LEDM1) on the motherboard. When LEDBMC
is blinking green, the BMC is functioning normally. Refer to the motherboard layout in Chapter
1 for the location of LEDBMC.
BMC Heartbeat LED Indicator
LED Color Denition
Green: Blinking BMC Normal