63
Chapter 4: Motherboard Connections
Watch Dog Timer
The Watch Dog function is a monitor controlled by the JWD1 that can reboot the system
when a software application hangs. It must be enabled in BIOS, where the default is set to
Reset. In the case an application hangs, jumping pins 1-2 will cause Watch Dog to reset the
system while jumping pins 2-3 will generate a non-maskable interrupt signal.
Watch Dog
Jumper Settings
Jumper Setting
Definition
Pins 1-2
Reset
Pins 2-3
NMI
Open
Disabled
4.6 LED Indicators
IPMI-Dedicated LAN LEDs
An IPMI-dedicated LAN is located on the I/O Backplane of the motherboard. The amber
LED on the right indicates activity, while the green LED on the left indicates the speed of the
connection. See the tables at right for more information.
IPMI LAN Link LED (Left) &
Activity LED (Right)
Color
State
Definition
Link (Left)
Green: Solid
100 Mbps
Activity (Right)
Amber: Blinking
Active
IPMI LAN
Link LED
Activity LED
BMC Heartbeat LED
LEDM1 is the BMC heartbeat LED. When the LED is blinking green, BMC is functioning
normally. See the table below for the LED status.
Onboard Power LED Indicator
LED Color
Definition
Green: Blinking
BMC Normal