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Chapter 4: Motherboard Connections
Watch Dog
JWD1 controls the Watch Dog function. Watch Dog is a monitor that can reboot the system
when a software application hangs. Jumping pins 1-2 will cause Watch Dog to reset the
system if an application hangs. Jumping pins 2-3 will generate a non-maskable interrupt
signal for the application that hangs. Watch Dog must also be enabled in BIOS. The default
setting is Reset.
Note:
When Watch Dog is enabled, the user needs to write their own application software
to disable it.
Watch Dog
Jumper Settings
Jumper Setting
Definition
Pins 1-2
Reset
Pins 2-3
NMI
Open
Disabled
4.6 LED Indicators
Dedicated IPMI LAN LEDs
A dedicated IPMI LAN is also included on the motherboard. The amber LED on the right of
the IPMI LAN port indicates activity, while the green LED on the left indicates the speed of
the connection. See the table below for more information.
IPMI LAN LEDs
Color
Status
Definition
Off
Off
No
Connection
Green:
Solid
Link/Speed
(Left)
100 Mb/s
Amber
Blinking
Activity
(Right)
Active
IPMI LAN
Activity LED
Link LED
LAN 1/LAN 2
IPMI LAN
(X8ST3-F)
UID LED Indicator
LED Color
Definition
Blue: On
Unit Identified
Unit ID LED
A rear UID LED indicator at LED1 is located near the UID switch on the I/O back panel. This
UID indicator provides easy identification of a system unit that may need service.
