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H8DMT/H8DMT-IBX/H8DMT-F/H8DMT-IBXF User’s Manual
2-14
CMOS Clear
JBT1 is used to clear CMOS, which will also clear any passwords. Instead of pins, this
jumper consists of contact pads to prevent accidentally clearing the contents of CMOS.
To Clear CMOS
1. First power down the system and unplug the power cord(s).
2. With the power disconnected, short the CMOS pads with a metal object such as a
small screwdriver.
3. Remove the screwdriver (or shorting device).
4. Reconnect the power cord(s) and power on the system.
LAN Controller Enable/Disable
The JPL jumper allows you to enable or diable the serverboard’s LAN controller. The
default position is on for both pins 1 and pin 2 to enable the LAN Controller. See the
table below for jumper settings.
Figure 2-9. Jumper Connector Pins and Setting
NOTE: Do not use the PW_ON connector to clear CMOS.
Jumper Setting Definition
Pins 1-2 LAN Controller Enabled (Default)
Pins 2-3 LAN Controller Disabled
Connector
Pins
Jumper
Setting
3 2 1
3 2 1