If You Are Unable To Change Any Values In Setup; If A Post Error Message Is Displayed; To Clear The Cmos Memory - HP 5/xx Series 4 User Manual

5 Troubleshooting Your PC
If Your PC Does Not Start

If you are Unable to Change any Values in Setup

Make sure that the Secure Switch is not set if you are unable to change
any of the values in Setup, see "Using the HP Setup Program" on
page 52.

If a POST Error Message is Displayed

If a POST error is detected when the PC starts, details of the error are
displayed. The BIOS offers two possibilities,
you can press
•
you can press
•
configuration error.
It is recommended that you correct the error before proceeding, even if
the PC appears to start successfully. You should start Setup to verify
that the accessory which caused the error has been correctly configured.
If the PC then starts, but POST still reports an error, clear CMOS
memory.

To Clear the CMOS Memory

1 Switch off the PC and remove the cover.
2 Set the system board switch 6 (CMOS STATUS) on the switch block
to CLOSED to clear the configuration.
3 Switch on the PC to erase the CMOS memory.
4 Wait until the PC has started. The screen will flash with the message
"Configuration has been cleared, set switch 6 to the OPEN
position before rebooting."
5 Switch off the PC.
6 Set the system board switch 6 (CMOS STATUS) on the switch block
to OPEN to re-enable the configuration.
7 Replace the cover.
8 Switch on the PC. An error message will be displayed
"System CMOS checksum bad - run SETUP"
The PC will stop.
9 Run Setup by pressing
automatically downloaded and saved.
10 Make any other changes you want and press
configuration and exit from Setup.
68 English
to ignore the error and continue, or
to run Setup and correct the system
. CMOS default values will be
to save the