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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.
BMC Heartbeat LED Indicator
LED Color
Definition
Green:
Blinking
BMC Normal
UID LED
LED Indicator
LED Color
Definition
Blue: On
Unit Identified
Unit ID LED
A rear UID LED indicator at LE1 is located near the UID switch on the I/O back panel. This
UID indicator provides easy identification of a system unit that may need service.