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Your computer will not start up with out a BIOS working, it starts the hard drive and loads the operating system.
The CMOS memory stores parameters which are updated by the operating system. Hence it needs a battery to keep the parameters. It also needs the operating system to make any necessary changes to start up again.
I do not know your full model number, but this utility will check if your pc is bootable.
compaq and hp bios password are easy to clear. all you have to do is unplug your laptop, remove all batteries, then you must open your laptop and locate the cmos battery and unplug it for about 3-5 seconds. then put it back together.
If you have forgotten your password and it is stored in the BIOS, then you can reset the BIOS to the factory default state by removing the BIOS battery, wait for over 1/2 hour for the BIOS to discharge and wipe its contents, then reconnect the battery. You will need to reconfigure the BIOS before Windows opens.
I do not know this model, but if the password is stored in an EEPROM chip then it is near impossble to reset it without knowing the actual password. It would be difficult to remove, if you know a friendly hacker with a piece of hardware that can read the contents of the EEPROM chip and then identify the password, so he can tell you what it is.
Best of luck.