Resetting The Computer - HP Nc6400 - Compaq Business Notebook Maintenance And Service Manual

Product Description

1.2 Resetting the Computer

If the computer you are servicing has an unknown password,
follow the steps below to reset the password. These steps also
clear CMOS.
✎
The following steps will not clear an unknown password if the
stringent security option has been enabled in the BIOS. If
stringent security is enabled, the system board must be replaced
to reset an unknown password. Refer to
Cover,"
Before replacing the system board, perform the steps below to
make sure stringent security has been properly enabled.
Enabling stringent security provides enhanced protection for the
power-on password and administrator password and other forms
of power-on authorization. Stringent security is enabled/disabled
by accessing the Password Options menu in the Computer Setup
utility.
1. Prepare the computer for disassembly (refer to
"Preparing the Computer for Disassembly,"
information).
2. Remove the real-time clock (RTC) battery (refer to
Section 5.11, "RTC Battery,"
removing and replacing the RTC battery).
3. Wait approximately 5 minutes.
4. Replace the RTC battery and reassemble the computer.
5. Connect AC power to the computer. Do not reinsert any
batteries at this time.
6. Turn on the computer.
All passwords and all CMOS settings have been cleared.
1–4
for more information on replacing the system board.
Section 5.21, "Top
for more information on
Maintenance and Service Guide
Section 5.3,
for more