Question about Compaq Presario V4000 Notebook
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You will have to remove the power cord, remove the battery
and remove the CMOS Battery that is located on the motherboard. On most
computers you will have to take the laptop apart to get to the cmos
battery. On some systems it looks like a silver nickel that you will need
a small flat head screw driver to pop it out. On other systems it will be
inside a vinyl covering and has a cable that plugs into the motherboard.
Once you remove the CMOS Battery, let it sit for an hour or two then put it
back in and put the laptop back together. Boot the machine and you'll
probably have to go into the Bios or System Setup because the system will have
forgotten the date, time and password.
If the password is not reset then you will have to short the password jumper on the motherboard with a screwdriver or there may be a pin on the motherboard that you can remove to reset it. I would consult the owners manual before attempting either of these two options.
I found the info below in the owners manual
1.2 Resetting the Computer
If the computer you are servicing has an unknown password,
follow these steps to set a new password. These steps also
1. Enter an incorrect password and press enter.
2. Repeat step 1 two more times.
After the third entry of the incorrect password, the computer
responds with a System Disabled message and provides an
3. On another computer running Windows XP, download the
unlock6.exe utility from the HP Channel Services Network
(CSN) Web site at http://www.hp.com/partners/csn. Copy the
unlock6.exe utility into the root directory (C\ drive).
4. Access MS DOS by clicking Start/All Programs/
5. Enter unlock6 xxxxx 0, where xxxxx is the password
generated by the computer in step 2.
The computer responds with another system generated
6. Enter the password generated in step 5 on the disabled
computer to enter the system BIOS. In the BIOS, navigate
to the Security tab and Administrator Password. Enter the
password generated in step 5 as the current password. Enter
a new password to change it.
7. The password has been reset and all CMOS settings have
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