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Chapter 4: Motherboard Connections
Power On and BMC/BIOS Status LED Button
The Power On and BMC/BIOS Status LED button is located on pin 1 of the front control panel
header located at JFP1. Momentarily contacting pin 1 of JFP1 will power on/o the system
or display BMC/BIOS status. Refer to the table below for more information.
Power Button
BMC/BIOS Status LED Indicator
Status Event
Green: solid on System power on
BMC/BIOS blinking green at 4Hz BMC/BIOS checking
BIOS blinking gree at 4Hz BIOS recovery/update in progress
BMC blinking red x2 (2 blinks red) at 4Hz, 1 pause at 2Hz (on-on-o-o) BMC recovery/update in progress
BMC/BIOS blinking green at 1Hz Flash not detected or golden image checking failure
BMC Reset Button/Front UID Switch
The System Reset button/Front UID switch connection is located on pin 2 of JFP1, which
is used in conjunction with the Reset button/UID switch select jumper located at JRU1. To
congure pin 2 of JFP1 for front UID switch use in a chassis that supports front UID connection,
close pins 1 and 2 of jumper JRU1. To set pin 2 of JFP1 for System Reset, close pin 3 and
pin 4 of jumper JRU1. Refer to the jumper section for more information on JRU1. Refer to
the motherboard layout in Chapter 1 for the location of JRU1.
Front UID Switch/Reset Button Select Jumper (JRU1)
Jumper Settings
State Description
Close pins 1 and 2 of JRU1 Pin 2 of JFP1: used for front UID switch support
Close pins 3 and 4 of JRU1 Pin 2 of JFP1: used for System Reset support
UID LED
The unit identier LED connection is located on pin 3 of JFP1. Refer to the motherboard
layout in Chapter 1 for more information on JFP1.
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