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Chapter 4: Motherboard Connections
Fail LED (Information LED for OH/FF/PF)
The Fail LED (Information LED for OH/Fan Fail/PWR Fail) connection is located on pin 4 of
JFP1. The LED provides warnings of overheating, power failure, or fan failure. Refer to the
motherboard layout in Chapter 1 for more information.
Fail LED (Information LED) (OH/Fan Fail/PWR Fail)
LED States
Status Description
Solid red (on) An overheat condition has occurred.
Blinking red (1Hz) Fan failure: check for an inoperative fan.
Blinking red (0.25Hz) Power failure: check for a non-operational power supply
Blinking red (10Hz) (FP red LED) CPLD recovery mode error(s)
Solid blue
UID has been activated locally. Use this function to locate a unit in a rack mount
environment that might be in need of service.
Blinking blue (1Hz)
Local UID has been activated locally on. Use this function to identify a unit that
might be in need of service.
BIOS/BMC blinking blue (10Hz) BIOS/BMC: recovery and/or update in progress
Red Info LED blinking (10Hz) and
MB UID LED blue blinking (10Hz)
CPLD: recovery and/or update in progress
LAN1/LAN2 (NIC1/NIC2)
The NIC (Network Interface Controller) LED connection for LAN Port 1 is located on pin 6 of
JFP1, and LAN Port 2 is on pin 5. Refer to the table below.
LAN1/LAN2 LED
LED States
Color State
NIC 2: Blinking green LAN 2: Active
NIC 1: Blinking green LAN 1: Active
HDD Activity LED
The HDD activity LED connection is located on pin 7 of JFP1. When this LED is blinking
green, it indicates HDD activity. Refer to the table below.
HDD LED
LED State
Color State
Blinking Green HDD Active
Standby Power LED
The LED indicator for standby power is located on pin 8 of JFP1. If this LED is on, standby
power is on.
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