Help with my Asrock z77 Extreme4! DIMM slots A1 and A2 are not working

Recently I tried to clean my pc so I had to remove all of the components and put them back together after cleaning. Usually at first boot i would get the Dr Debug Error 55 meaning there's no ram and what i just usually do is just reposition them (From A1 and B1 to A2 and B2 or vice versa). But today wherever i reposition them, I would always get the error 55. Tried to just use 1 stick (i use 2x4gb patriot 1333mhz btw) and both sticks were fine at B1 and B2 slots but at A1 and A2 slots always show the error 55. My rig's just about 2 months old so everything's quite new.

I have updated bios and only 1 hdd and my psu's more than enough for my rig.

Is my motherboard already busted? Because it's really hard to get a replacement here in my country especially at the store where I bought it because they really are a pain in the as* whenever they interrogate me about mishandling and the likes.