SUPER MICRO Computer H8DMT user manual Cmos Clear, LAN Controller Enable/Disable

H8DMT/H8DMT-IBX/H8DMT-F/H8DMT-IBXF User’s Manual

Figure 2-9. Jumper Connector Pins and Setting

3 2 1 Connector

Pins

Jumper

3 2 1

Setting

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.

NOTE: Do not use the PW_ON connector to clear CMOS.

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.

Jumper Setting	Definition
Pins 1-2	LAN Controller Enabled (Default)
Pins 2-3	LAN Controller Disabled

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