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Chapter 4: Motherboard Connections
Unit ID LED
A rear unit identifier (UID) indicator at LE6 is located near the UID switch on the I/O back
panel. It provides easy identification of a unit that may need service.
Onboard Power LED
The Onboard Power LED is LE3. When this LED is on, the system power is connected.
BMC Heartbeat LED
LEDM1 is the BMC heartbeat LED. When the LED is blinking green, BMC is functioning
normally.
M.2 Heartbeat LEDs
When LE4 and LE7 are blinking, M.2-P1 and M.2-P2, respectively, are functioning normally.
4.5 LED Indicators
Network LAN LEDs
The Ethernet ports each have two LEDs. One LED indicates activity when flashing green.
The other may be green, amber or off to indicate the speed of the connection.
BMC-Dedicated LAN LEDs
A dedicated BMC LAN port provided a connection to the BMC. The Link LED indicates the
speed of the connection. The other LED indicates activity.
BMC Link LED
Color
Definition
Off
No Connection
Green
100 Mb/s
Amber
1 Gb/s
IPMI LAN
Link LED
(speed)
Activity LED
