Clearing And Resetting The Cmos; Hardware Overview On; Using The Cmos Button To Reset Cmos - HP Z230 Maintenance And Service Manual

Clearing and resetting the CMOS

This section describes the steps necessary to successfully clear and reset the CMOS. The CMOS of
the computer stores password information and information about the computer configuration.

Using the CMOS button to reset CMOS

To clear CMOS using the Clear CMOS button, use the following procedure:
WARNING!
the power cord from the wall outlet and allow the internal system components to cool before touching
them.
CAUTION:
board, even when the computer is powered off. Failure to disconnect the power cord can result in
damage to the system.
Static electricity can damage the electronic components of the computer or optional equipment.
Before beginning these procedures, be sure that you are discharged of static electricity by briefly
touching a grounded metal object.
1. Back up your computer CMOS settings, run Computer Setup (f10) Utility, and select File > Save
to Disk.
CAUTION:
erases customized information, including asset numbers and special settings.
2. Shut down the operating system, power off the computer and external devices, and disconnect
peripheral devices.
3. Disconnect the AC power cord from the power outlet.
NOTE:
4. Open the workstation.
5. Locate, press, and hold the CMOS button for five seconds.
For assistance locating the CMOS button and other system board components, see the system
board layout in
6. Close the workstation, reconnect external devices, connect the power cord and turn on the
workstation.
7. The system boots to an f1 prompt and displays a message that the date/time has changed and
that system options have changed.
8. Press f1. The system shuts down for three seconds and then powers on again.
9. Use Computer Setup (f10) Utility to reset the date and time.
102 Chapter 5 Configuring password security and resetting CMOS
To reduce the risk of personal injury from electric shock and hot surfaces, disconnect
When the computer is plugged in, the power supply has voltage applied to the system
Pressing the Clear CMOS button resets CMOS values to factory defaults and
The CMOS button does not clear CMOS if the power cord is connected.
Hardware overview on page 1.