Recently, I've been having ocassional issues with my computer. Sometimes, while using it, the screen goes black, and there's no HD activity. I can't power it down by holding the power button, so I have to actually remove the power chord. If I try to restart the computer right after this happens, the screen remains black, no BIOS is loaded and HD activity happens very briefly at the beginning and then nothing else. I have to wait around 1 minute to get it to boot normally. The issue doesn't happen at a specific time; sometimes 5 minutes in or 50 minutes in. I have actually used my computer 7 hours straight without anything happening. I have a cool room, 4 fans and my temperature indicator doesn't detect any alarming temperatures. This started happening a few months ago. I thought it was a HD issue, so I bought a new one, but the issue remained (at least now I have 2 TBs ). I built the desktop in December 2011. The motherboard is GIGABYTE GA-990FXA-UD3, cpu is AMD 1100T, 16 Gb of Corsair Blue DDR3 RAM at 1600 Mhz, and the vcard is a radeon 6950. I use it mainly for gaming and programming. I checked the motherboard and didn't see any liquid around the caps. I didn't notice any bulges or anything, but I believe this is a capacitor plague. Also, since I can't check the power source caps, I can't be sure if the issue is on the powersource and not the MOBO. Any ideas/thoughts? Thanks!