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Chapter 4: Motherboard Connections
Onboard Power LED
PWROK is an Onboard Power LED. When this LED is illuminated, it means power is present
on the motherboard. In suspend mode this LED will blink on and off.
BMC Heartbeat LED
A BMC Heartbeat LED (BMC_HB LED) blinks to indicate BMC is functioning normally.
BMC Heartbeat LED States
Color
State
Definition
Green
Solid On
BMC is not ready.
Green
Blinking
BMC Normal
Green
Fast Blinking
BMC: Initializing
4.5 LED Indicators
LAN LEDs
The LAN ports are located on the I/O back panel on the motherboard. Each Ethernet LAN
port has two LEDs. The yellow LED indicates activity. Link LED, located on the left side of
the LAN port, may be green, amber or off indicating the speed of the connection.
LAN Link Indicator
LED Settings
LED Color Definition
Off
No connection or 100 Mbps
Green
10 Gbps
Amber
Less than 10 Gbps
Link LED
Activity LED
BMC LAN Port LEDs
A dedicated BMC LAN on the rear I/O panel has two LED indicators. The LED on the right
indicates activity, while the Link LED on the left indicates the speed of connection. The Link
LED may be green, amber, or off to indicate the speed of the connection.
BMC LAN LED
Link LED (left)
LED Color
Definition
Off
10 Mb/s
Green
100 Mb/s
Amber
1 Gb/s
BMC LAN
Link LED
Activity LED
