Compaq D51s Troubleshooting Guide - Page 69

Resetting the Password Jumper, On most system boards, the header is labeled E49 or P49.

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Password Security and Resetting CMOS Resetting the Password Jumper To disable the power-on or setup password features, or to clear the power-on or setup passwords, complete the following steps: 1. Shut down the operating system properly, then turn off the computer and any external devices, and disconnect the power cord from the power outlet. 2. Disconnect the keyboard, monitor, and any other external devices connected to the computer. Å WARNING: To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet, and allow the internal system components to cool before touching. Ä CAUTION: When the computer is plugged in, the power supply always has voltage applied to the system board even when the unit is turned off. Failure to disconnect the power cord can result in damage to the system. Ä CAUTION: Static electricity can damage the electronic components of the computer or optional equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. See the Safety & Regulatory Information guide for more information. 3. Remove the computer cover or access panel. 4. Locate the header and jumper. ✎ On most system boards, the header is labeled E49 or P49. ✎ For assistance locating the password jumper and other system board components, see the Illustrated Parts Map (IPM) for your particular system. 5. Remove the jumper from pins 1 and 2. Place the jumper over pin 2 only, in order to avoid losing it. B-2 Troubleshooting Guide

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B–2
Troubleshooting Guide
Password Security and Resetting CMOS
Resetting the Password Jumper
To disable the power-on or setup password features, or to clear the
power-on or setup passwords, complete the following steps:
1. Shut down the operating system properly, then turn off the
computer and any external devices, and disconnect the power
cord from the power outlet.
2.
Disconnect the keyboard, monitor, and any other external devices
connected to the computer.
Å
WARNING:
To reduce the risk of personal injury from electrical shock
and/or hot surfaces, be sure to disconnect the power cord from the wall
outlet, and allow the internal system components to cool before
touching.
Ä
CAUTION:
When the computer is plugged in, the power supply always
has voltage applied to the system board even when the unit is turned
off. Failure to disconnect the power cord can result in damage to the
system.
Ä
CAUTION:
Static electricity can damage the electronic components
of the computer or optional equipment. Before beginning these
procedures, ensure that you are discharged of static electricity by briefly
touching a grounded metal object. See the
Safety & Regulatory
Information
guide for more information.
3. Remove the computer cover or access panel.
4. Locate the header and jumper.
✎
On most system boards, the header is labeled E49 or P49.
✎
For assistance locating the password jumper and other system board
components, see the Illustrated Parts Map (IPM) for your particular
system.
5. Remove the jumper from pins 1 and 2. Place the jumper over
pin 2 only, in order to avoid losing it.