i have one hp compaq 6730s . i tray to make bios up date and now i have black screen how to fix it?...details about thi laptop...Model Hp Compaq 6730sRomDate 09/18/2008Rom Revision 68pzu F.07video Bios Revision Intel 1625afudos/inewBios.Rom pbnci need help becouse i dont now how to do the usb flash bios