User's Manual

Chapter 5: Advanced Serverboard Setup

5-19

5-9 Jumper Settings

Explanation of

Jumpers

To modify the operation of the

serverboard, jumpers can be used

to choose between optional settings.

Jumpers create shorts between two

pins to change the function of the

connector. Pin 1 is identiﬁ ed with a

square solder pad on the printed circuit

board. See the diagram at right for

an example of jumping pins 1 and 2.

Refer to the serverboard layout page

for jumper locations.

Note: On two-pin jumpers, "Closed"

means the jumper is on and "Open"

means the jumper is off the pins.

CMOS Clear

JBT1 is used to clear CMOS and 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.

Connector

Pins

Jumper

Setting

321

VGA Enable/Disable

JPG1 allows you to enable or disable

the VGA port. The default position

is on pins 1 and 2 to enable VGA.

See the table on the right for jumper

settings.

VGA Enable/Disable

Jumper Settings (JPG1)

Jumper Setting Deﬁ nition

Pins 1-2 Enabled

Pins 2-3 Disabled