hi i have a hp compaq presario v4000 and i tried to update bios and faild. i have tried to recover usig: HP USB Disk Storage Format Tool Phoenix_Crisis_Recovery WINCRIS BootFlashDos none of them worked. i tried using usb floppy, usb flash disk, the computer dont boot. i tried al the key combinatio FN+B, WIN+B, FN+F, FN+esc, CTRL+END, all 4 arows, still nothing. can anyone help me please?