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Chapter 4: Motherboard Connections
4.4 LED Indicators
IPMI LAN LED
The yellow LED indicates activity, while the green/amber LED indicates the speed of the
connection.
IPMI LAN
Link LED
Activity LED
Link LED
Connection Link Speed Indicator
LED Color
Definition
None
10 Mb/s
Green
100 Mb/s
Amber
1 Gb/s
Activity LED
Color
State
Definition
None
No Connection
Yellow
Solid On
Link
Yellow
Flashing
Active
BMC Hearbeat LED
A BMC Heartbeat LED is located at BMC_HB LED2 on the motherboard.
BMC Heartbeat
LED State
Color
State
Definition
Green
Solid On
BMC is not ready
Green
Blinking
BMC Normal
Green
Fast Blinking
BMC: Initializing
Onboard Power LED
PWR_OK LED3 is an onboard Power LED. When this LED is lit, the system is turned on and
all the system power rails are ready. When the system is turned off, or any one of the system
power rails fail, this LED will turn off.
Onboard Power
LED Indicator
LED Color
Definition
Off
System Off (power cable not connected)
Green
System On, Power OK
UID Switch and LED Indicator
The rear UID LED1 is located next to the UID switch. The front UID LED is located on the
front panel. When you press the UID switch, both rear and front UID LED indicators will
turn on. Press the UID switch again to turn off the LED indicators. Use this UID Indicator to
'mark' the system, so the system can be easily identified whether on the front or back (e.g.,
a system rack with multiple units installed).
