Clearing And Resetting The Cmos - HP EliteDesk 800 G1 Maintenance & Service Manual

Clearing and resetting the CMOS

The computer's configuration memory (CMOS) stores information about the computer's configuration.
The CMOS button resets CMOS but does not clear the power-on and setup passwords.
Clearing CMOS will clear the Active Management Technology (AMT) settings in the Management
Engine BIOS Extension (MEBx), including the password. The password will default to "admin" and will
need to be reset. The AMT settings will also need to be reset. To access the MEBx, press
POST.
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.
WARNING!
sure to disconnect the power cord from the wall outlet, and allow the internal system components
to cool before touching.
CAUTION:
the system board even when the unit is turned 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, 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 rear cover.
CAUTION:
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
information on backing up the CMOS settings.
146 Chapter 11 Password Security and Resetting CMOS
To reduce the risk of personal injury from electrical shock and/or hot surfaces, be
When the computer is plugged in, the power supply always has voltage applied to
Pushing the CMOS button will reset CMOS values to factory defaults. It is important
Computer Setup (F10) Utility on page 64
Ctrl+P during
for