Hello. I have DQ77KB with i3-2100 and 4gb Hynix 1600 Mhz. All worked good before bios update (video signal passed through HDMI). After bios updated to last version sometimes video signal lost but system work normally. I tried back default bios settings through bios update but probably it was fail and system DOESN'T BOOT: no video signal, bios recovery doesn't work (motherboard even doen't try to read any media (DVD, USB). What to do?