Serious issue while building pc.

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Okay so I finally got all my parts to build my pc, and everything was going well until a few incidents.

When building the computer, I installed the GPU on top of the ssd m.2 in which case I had to take it out, and my dad not knowing the gpu was locked in accidentally pulled the whole pci slot out (fml).

First question is, is that a big deal? I don't think I'll find myself using that slot, is it okay to leave it exposed?

Now on to the more serious note, very serious note! I continued building and had everything done. Tested it and it was working perfectly. All 5 fans were working, the motherboard, psu, graphics card and ram turned their lights on. Now, when I hid all the wires, and closed the case, and was ready to turn it on to hook it to the display, the fans wouldn't turn, nor the ram would turn on. Only thing lighting up was the motherboard. So I took the case apart and tried to see what the issue was. Tried reassembling but nothing worked.
One thing I did try was this power port that came with my psu to see if it's working (here comes the scary part), when I inserted it and turned it on to see if the psu was working correctly I saw a spark and a really strong smell reminiscent of burning plastic. The weirder part is that everything after that was working; however, once again when I take it off the power tester and put it back to the motherboard, nothing turns on but the motherboard itself.

Can anyone shed some advice on what to do, what to look at? Has anyone experienced a spark followed by a burning smell?

Here's my build http://imgur.com/11P9i3G .

 
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Calculagator

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Fist, YES it's a big deal. The kind of force necessary to pull a slot out is likely to break your motherboard. They aren't designed to withstand much physical abuse. Your motherboard might be ok, but don't count on it.
Second, you can't tell what is working by which lights turn on. Lights turning on is certainly better than not, but it only means that the lights work.

It sounds like you have either a loose cable or short in your motherboard. Make sure your motherboard isn't touching the case anywhere and that there aren't any extra standoffs shorting with the motherboard. There could be a short or broken connection where the physical damage occurred as well.

Sparks are usually a bad sign, but how severely bad depends on where the spark was. It could have been a fairly harmless arc between conductors in a loose connection.
 
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I see. Do you think that 550W is more then enough for the pc I'm building? Is it okay to assume that the psu is not the problem since it's working? Or should I return the psu, and see if I can also get the motherboard returned or repaired? The spark happened right under the m.2 port.
 
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550w is enough. I wouldn't assume anything about the PSU. I'm confused by your description of events. If the spark happened when you plugged the PSU into the tester, why would it be on your motherboard? There shouldn't have been power anywhere near your motherboard when testing the PSU. You must not have fully unplugged your PSU before testing it. That could have killed your motherboard.
I would again check for any shorts between the motherboard and case or where the physical damage is. If you can find and remove them, it might still work if you are very lucky. Otherwise, buy a new motherboard.
 
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Sorry for the confusion. I'll try to describe as best I can. I connected everything within the case, everything is working properly. Fans are working, motherboard, all items are working. For some reason when I finished putting the case back together (Tempered glass, front case, tying all the cables), when I went to turn it on, it wouldn't work. Only thing I can see on is a few green lights on the motherboard. The fans weren't moving. Not even the fan that comes inside the psu. I tried disconnecting and reconnecting everything, but to no avail. That's when I shut the psu off, and I said I'll see if the psu is the issue by trying it on the testing power adapter that came with the EVGA supernova. When I tried it, I see the spark, and smell it burning; however, at the same time, all the fans, started to work. I turn it back off and connect it back to the motherboard; however, once again all that happens is the motherboard turns on, and the graphics card logo seems to glow. None of the fans including the one on top of the psu turn on.

I would think it's the motherboard, just strange how everything was working one second, and then it just randomly stopped.
Though I wouldn't think it's the psu, the fact that I'm unsure makes me want to be more safe than sorry and return both, in case the motherboard comes back, and the problem persist which in that case would suggest there's an issue somewhere else; however, if it seems like there's no way the power supply is at fault here, then i'll just wait on the motherboard.
Thank you for your time.
 
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It's not strange that things don't turn on. The motherboard controls when things get turned on and off. You wouldn't want all of the fans running when you shut down your computer.
It still sounds like a short in the motherboard. It's detecting something wrong and preventing startup to avoid damage. It could also be that you haven't properly connected the power button.
 
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I just checked everything to make short. Everything is connected, I guess it is the motherboard. I'll find out tomorrow when I pick a new one up.
 
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