Troubleshooting Guide

B–4 www.hp.com Troubleshooting Guide
Password Security and Resetting CMOS
See the Desktop Management Guide on the Documentation CD for
further instructions on reestablishing passwords. For instructions on
Computer Setup, see the Computer Setup (F10) Utility Guide on the
Documentation CD
Using the CMOS Switch to Reset CMOS
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Use this method to reset CMOS if you cannot access Computer Setup.
If you can access Computer Setup, refer to the previous section for
instructions on using Computer Setup to reset CMOS.
1. 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
equipment connected to the computer.
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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.
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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.
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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 on the Documentation CD for more information.
3. Remove the computer cover or access panel.
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CAUTION: Sliding the CMOS switch will reset CMOS values to factory
defaults and will erase any customized information including passwords,
asset numbers, and special settings. It is important to back up the
computer CMOS settings before resetting them in case they are needed
later. Back up is easily done through Computer Setup. See the Computer
Setup (F10) Utility Guide on the Documentation CD for information on
backing up the CMOS settings.