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Chapter 4: Motherboard Connections
BMC Heartbeat LED
LEDM1 is the BMC heartbeat LED. When the LED is blinking green, BMC is functioning
normally. See the table below for the LED status.
Onboard Power LED Indicator
LED Color
Definition
Green:
Blinking
BMC Normal
4.5 LED Indicators
UID LED
LED Indicator
LED Color
Definition
Blue: On
Unit Identified
Unit ID LED
A rear UID LED indicator at UID_LED1 is located near the UID switch on the back panel. This
UID indicator provides easy identification of a system.unit that may need service.
IPMI LAN LEDs
The dedicated IPMI LAN has two LED indicators. The amber LED on the right indicates
activity, while the LED on the left indicates the speed of the connection. See the table below
for more information.
IPMI LAN LEDs
LED
Color/State
Definition
Link (left)
Green: Solid
100 Mbps
Activity (Right)
Amber: Blinking
Active
Onboard Power LED Indicator
LED Color
Definition
Off
System Off (power cable not connected)
Green
System On
Onboard Power LED
The Onboard Power LED is located at LE2 on the motherboard. When this LED is on, the
system is on. Be sure to turn off the system and unplug the power cord before removing or
installing components. Refer to the table below for more information.
