Jumper Block Overview - NEC POWERMATE PRO150 Manual

Jumper Block Overview

The system board in your computer contains a 27-pin block of configuration
jumpers in a 3 x 9 array. The jumper block makes it possible to change the
system configuration. For instance, you can prevent access to the system
Setup program by moving a jumper. If you forget your system password,
you can clear the password by moving a jumper. The system has been
properly configured at the factory. Normally, the only time you will ever
change a jumper is if you need to:
Change the system operating speed
Clear the User or Administrator password
Reset the CMOS RAM settings to the default values
Disable or enable access to the Setup program
Recover from a corrupted BIOS during a BIOS upgrade
Figure 5-2 shows the location of the jumper block on the system board.
Descriptions of how to change the jumpers follow Figure 5-2.
! CAUTION
Do not squeeze the pliers or other tool you use to remove a
jumper, or you might bend or break the pins.
Notes
A jumper is a small plastic-encased conductor that slips
over jumper pins, as shown in Figure 5-2. To change a
jumper setting, use a pair of fine needle-nosed pliers to
remove the jumper from its current location and slide it
onto the new pins to obtain the desired setting.
The Recovery Boot enable jumper is briefly described in this
chapter. The jumper is intended to be used only if the BIOS
has been corrupted during a BIOS upgrade. A description
of how to use the jumper is found in Appendix A "BIOS
Update and Recovery."
5-4
Installing and Configuring System Board Options