Originally Posted by Jim McNasty;14424345
My solution would be to remove all the access panels at the back and look for the cmos battery. Depending on the model number of course, sometimes its easy to get to or sometimes you might need to tear the whole thing apart to get it. Look behind all the access panels on the back and if you can, remove the keyboard to see if its there....if you still cant see it, you can either take it apart to get to it, beg Sony for help or do EduFurtado says.
If you can find the battery, you might not be able to remove it so be warned, if you can just remove it for 10 mins and make sure the laptop battery is out and the a/c power cord is removed, that'll reset it the bios password.
I actually tried this, 1st ever time pulling apart a laptop (nervous!) but I found the CMOS battery, disconnected it for quite a while nothing else was plugged in either, put it all back together, tried to enter BIOS and still asks for PW... GRRRRRR!