Resetting The Notebook - HP Compaq Presario,Presario R4000 Maintenance And Service Manual

Product Description

1.2 Resetting the Notebook

If the notebook you are servicing has an unknown password,
follow these steps to clear the password. These steps also
clear CMOS:
1. Prepare the notebook for disassembly (refer to
"Preparing the Notebook for Disassembly,"
information).
2. Remove the real-time clock (RTC) battery (refer to
Section 5.22, "System Board,"
removing and replacing the RTC battery).
3. Wait approximately 5 minutes.
4. Replace the RTC battery and reassemble the notebook.
5. Connect AC power to the notebook. Do not reinsert any
battery packs at this time.
6. Turn on the notebook.
All passwords and all CMOS settings have been cleared.
1–4
for more
for more information on
Maintenance and Service Guide
Section 5.3,