I'm asking here but I have little hope in fixing my problem. I have an old mobo GA-Z77-D3H that I think having bricked. I'm stupid so I tried updating my bios with @bios and windows wouldn't start after that. So I decided like a stupid guy to change my HDD booting to raid and disabled legacy support in the bios. It was suggested on a forum. Well the fact is now I cannot get past the bios splashscreen and no keyboard input works. I tried several time to clear CMOS by removing the battery of the mobo for 10 minutes to no avail. Now the bios splashscreen is up, I hear 3 beep from the mobo at 20 seconds interval and then it goes black. I also tried inputting a ps/2 keyboard and it didn't work either.

So is there any hope beside changing the mobo ? Thank you for your time.