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Chapter 4: Motherboard Connections
4.5 LED Indicators
IPMI LAN LEDs
An IPMI-dedicated LAN, supported by the onboard Baseboard Management controller, is
located on the I/O panel. The LED on the right indicates activity when flashing amber, while
the LED on the left (Link) indicates the speed of the connection.
IPMI LAN Link LED
LED State
LED Color
Definition
Amber
1 Gbps
Green
100 Mbps
BMC Heartbeat LED
BMC_HB_LED is the BMC heartbeat LED. When the LED is blinking green, BMC is
functioning normally.
Unit ID LED
A front UID LED indicator (LED4) is integrated with the UID switch. It can be activated to help
identify of a unit that needs service.
Onboard Power LED
The Onboard Power LED is located at PWR_LED on the motherboard. When this LED is
active, the system is powered on.
Standby Power LED
An onboard Standby Power LED is located at LED_PWR_SB. When this LED is on, the AC
power cable is connected and the power supply hard switch is on.
LAN LEDs
The eight LAN ports, located on the front I/O panel, each have two LEDs. One LED indicates
activity when flashing amber, while the other (Link) LED may be green, amber or off to indicate
the speed of the connection.
LAN Link LED
LED State
LED Color
Definition
Off
No Connection/10 Mbps
Amber
1 Gbps
Green
100 Mbps
