That particular laptop wont erase the bios pw on removal of the cmos battery if i'm not mistaken.
1. if you enter the wrong password 3 times what is the error code you are given if any?
2. what happens after you put the password in incorrectly 3 times? does it reboot automatically or go to another screen?
3. what is the exact model of the computer. Need this to get the mobo info
Also to start i would
Download Hirens Boot CD LOOK HERE
install it on a usb drive and put it in the computer. If the login screen still comes