Sorry to kick an old topic but i'm having the same problem.
I've got a Gigabyte GA-Z77-D3H mainboard, and i can't get in the bios.
As soon as i press delete (or any of the other functions, like F9 etc) i just get a black screen, and the computer freezes and has to be reset via the reset button as keyboard also doesn't respond.
I found that a couple of the USB 3.0 ports on the back don't work and read that that could be down to the older versions of the mainboard.
I've never flashed a bios and am still on F7, so i've downloaded version F16 and was hoping to use that Qflash but i can't even seem to enter the bios.
Not sure if it has anything to do with it, but i noticed recently that my bios startup screen has "blown up" size wise.
I looks like this on my monitor for the brief 2 seconds i see it :
Instead of this
Any tips/advice on how to enter the bios without it freezing ?
As soon as i reset the pc starts up fine, and goes straight into windows but obviously that's not what i want.
My basic specs if that's of any use :
Intel Core i5 3570K @ 3.40 Ghz
Gigabyte Z77X-D3H
16 GB DDR3 duel channel memory
AMD Radeon HD 7900 series, 1024 MB