Computer wont display on monitor via DVI/HDMI-DVI

Hey guys

So yesterday I was playing games on my computer when it suddenly turned off without any warning, only to boot up a few seconds later with no display on the monitor. Naturally, i tried replugging the cables and restarting my computer but it wouldn't show up. Strangely enough, my keyboard would actually flash in the custom color pattern I gave it through drivers, so it would've at least been able to reach the desktop otherwise the colors would have been on their default setting. When I replugged the cables to my monitor the screen actually displayed for a split second then went blank. I tried reseating my CMOS but no luck. Next, I noticed the graphics card was quite loose so I reseated and tightened it. Still blank, although now it was just restarting constantly. After reseating the ram it was starting normally again, but still no display. I also noticed a burning smell inside my computer, at first I thought it was my cpu, I noticed the plastic was still on it. After taking it off I'm now not sure where it's coming from, it could be the gpu, cpu, or psu, although I think its probably between the gpu and psu. I also tried using a DVI to HDMI cable, but again the screen only displayed for a split second and has stayed blank since. I have confirmed that the monitor works fine when connecting via laptop, so I've narrowed it down to my PC. I even tried unplugging the power cord and holding down on the power button for about a minute, tried again and still doesn't work. I honestly don't know what else to do, any help would be greatly appreciated!