Resetting The Computer - HP Compaq NX4820 Maintenance And Service Manual

Product Description

1.2 Resetting the Computer

If the computer you are servicing has an unknown password,
follow these steps to clear the password. These steps also
clear CMOS:
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 5.16, "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
battery packs at this time.
6. Turn on the computer.
All passwords and all CMOS settings have been cleared.
1–4
for more information).
Maintenance and Service Guide
Section 5.3,
for more