Clearing And Resetting The Cmos; Using The Cmos Switch - HP xw4550 Service And Technical Reference Manual

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 switch

1. Shut down the operating system, and power off the workstation and any external devices.
Disconnect the workstation power cord 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 disconnect the power cord from the wall outlet and allow the internal system components to cool
before touching.
CAUTION:
applied the system board even when the unit is powered off. Failure to disconnect the power cord
can result in damage to the system.
CAUTION:
equipment. Before beginning these procedures, be sure that you are discharged of static electricity
by briefly touching a grounded metal object.
3. Remove the access panel.
CAUTION:
they are needed later. Activating the CMOS switch resets CMOS values to factory defaults and
erases any customized information, including passwords, asset numbers, and special settings. To
back up the CMOS settings, use the Computer Setup (F10) Utility and run the Save to Diskette
option from the File menu.
4. Locate, press, and hold the CMOS switch in the detente position for five seconds.
NOTE:
does not clear CMOS if the power cord is connected.
NOTE:
located on the inside of the workstation access panel or the
on page 58
5. Replace the access panel.
6. Reconnect any external devices.
7. Plug in and power on the workstation.
The workstation will power up for 3-to-5 seconds, then power off.
NOTE:
system date and time.
ENWW
To reduce the risk of personal injury from electrical shock and hot surfaces, be sure
When the workstation is plugged in to a line voltage source, voltage is continuously
Static electricity can damage the electronic components of the workstation or optional
It is important to back up the workstation CMOS settings before resetting them in case
Ensure that the AC power cord is disconnected from the power outlet. The CMOS switch
To locate the CMOS switch and other system board components, see the service label
section of this guide.
You must reset the workstation passwords and any special configurations, along with the
System board components
Clearing and Resetting the CMOS 137