HP Xw4200 - Workstation - 1 GB RAM, Service And Technical Reference Manual

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CLEARING AND RESETTING THE CMOS
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Appendix H
Clearing and Resetting the CMOS
The CMOS of the workstation stores password information and information about the workstation
configuration. This section describes the steps to successfully clear and reset the CMOS.
Using the CMOS Button
To use the CMOS button:
1 Shut down the operating system and then turn off the workstation and any external devices.
Disconnect the power cord of the workstation and any external devices from the power outlets.
2 Disconnect the keyboard, monitor, and any other external devices that are connected to the
workstation.
WARNING! To reduce the risk of personal injury from electrical shock and hot surfaces, be sure to
disconnect the power cord from the wall outlet and allow the internal system components to cool before
touching.
CAUTION When the workstation 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.
CAUTION Static electricity can damage the electronic components of the workstation or optional
equipment. Before beginning these procedures, ensure that you are discharged of static electricity by
briefly touching a grounded metal object.
3 Remove the access panel.
CAUTION Pushing the CMOS button resets CMOS values to factory defaults and erases any
customized information including passwords, asset numbers, and special settings. It is important to back
up the workstation CMOS settings before resetting them in case they are needed later. To back up the
CMOS settings, use Computer Setup and run the Save to Diskette option from the File menu.
4 Locate, press, and hold the CMOS button in for five seconds.
NOTE Be sure that the AC power cord is disconnected from the power outlet. The CMOS button does
not clear CMOS if the power cord is connected.
NOTE For assistance locating the CMOS button and other system board components, see “System
Board Components” on page 17 .