HP ProBook 450GO won't boot and caps lock "blinking" continuously.

Hi,

I'm trying to help a friend with his laptop a Probook 450G0.

It won't boot and caps lock "blinking" continuously.

When I got it caps lock and num lock was "blinking" two times... indicated BIOS corruption error problems

It can not recoverfrom a hard disk,because allpartition wereformated before.

I try hard reset and this method bios flush from usb

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02693833&cc=us&dlc=en&lc=en&jumpid=reg_r1002_usen

i cant flush. 
You can give adetailed manualhow to do itfor my model?

maybe Ineed toremove the hard drive,that it couldfind autility partitionon the usb flash drive?

Anyone with some ideas???