Asrock Z87 extreme6/ac: strange behaviour

[lievenborms]

[lievenborms]

Re: Asrock Z87 extreme6/ac: strange behaviour

Update:

I was able to find a refurbished version of my motherboard (Asrock Z87 extreme6/ac)
After changing the mortherboard everything worked immediately without any issues.
By tis I know by sure that there's nothing wrong with the CPU, memory, hard disks,...
I also changed the 2 BIOS IC's and these of my broken mother board are working in the new one. The new IC's couldn't solve the problem when putting them in the broken motherboard.
So at my opinion there's only one cause and that's a hardware failure.

Is there anything that I can do for solving this or is it just better to throw away this board?