okay you updated bios on your laptop did it finish updating bios? did you do cntrl+alt+delete to restart it? or did you just shut it down? when you try to boot anything on the screen? any lights? the cpu fan goes on? what is the certain laptop?
try to answer as many questions in the order please. It does seem like the flash didn't off all the way. One thing to do is discharge your whole laptop. Taking apart and removing the cmos, removing the cmos jumper cables (some laptops have them not sure your has one)