lol.
Either take the battery out for 3 to 5 minutes, or there are three points like this |||, 2 would be covered with plastic cap ||.| colored black, green, red or blue.
Find out which one of these is for BIOS. Usually they are located near battery. Read on motherboard, or check the manual. just take the cap off and put it on 1.2 (if on 2.3) or 2.3 (if on 1.2). for some seconds, switch back as before, then switch it on.
make sure powers not supplied when doing this operation.