i have ga-ep31-ds3l witch have virtual dual bios

i flash it with q-flash utility from bios

when it said flash compled successfully ,i reboot the system.

from that moment and till now i have blank screen

tha pc starts ,fans working etc but no screen

i tried boot floppy disk,boot usb,boot cd,clear cmos but nothing

does enyone know how to recover bios ? or there is no hope...

thank you