Hello. I'm in a spot of trouble here, as it appears one of my mobo's (ASRock p67 extreme4 gen3) RAM slots no longer works. It has worked just fine in the past. I was just remounting my cpu cooler (which is a hyper 212 plus), and after I did that my PC would not start. It would not even show BIOS, just a blank screen, and the system would keep restarting. The debug LED said 55 (memory issue). I took one of the RAM sticks out, and it fixed the problem. I tried putting the stick that i knew worked into the other RAM slot, and it didn't work. I've now established that the slot itself must be the problem. What could have caused this? I never even touched the RAM area on the board, but could it be ESD? Can that spread to other parts of the motherboard? I'm stuck in single channel memory for the moment, and I know the board has a two year warranty from newegg (which is where I bought the mobo). I only bought it a year ago. Should I see if I can get a replacement? I don't really know what could be causing the problem, somebody said that it could be a short from the backplate of the cpu cooler (Which shouldn't be the case for me, as my cooler has been on my pc since day 1). I have no idea what could have caused this. This really bites, as I was just about to upgrade to a gtx 670, and the mount that I did (even though I somehow messed something up in the process) was the best one I have ever done, with really good cpu temp. If anybody could be of assistance, that would be great.