What are the chances my motherboard is fried?

a3grimreaper

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Oct 24, 2015
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QUICK BACKSTORY: I just finished a new build. The initial build went off without any issues, and the entire system worked fine. I had a few fans to add to the case after-the-fact, and after doing so, the system would no longer boot up.

So here's the problem: Everytime I try to start it, everything comes on for less than a second, shuts off for 3 seconds, then comes back for less than a second, and the process repeats. While I was disconnecting the PSU to test it, I noticed the motherboard was loose. I was quickly able to spot an empty hole where a screw had once been.

I removed the screw by tilting the case. I'm not sure where it was in the case, but I can say that there is a high probability that it was in contact with the top of the motherboard for several of these 1 second power-ups.

Before I take the entire thing apart, I'd like a few extra opinions on the likelihood that this destroyed the motherboard.
 
Solution
Probably small. One screw should not make a motherboard loose though, rather odd. More likely a screw making a contact from the board to the case would short it and not allow it to start, just probably not fry anything with any luck.

And most likely one or more of the fans is not properly attached and is causing a short.

I would pull everything out carefully and do a bench build on a large sheet of cardboard, easier to adjust parts and no chance of a case short. If all goes well, put it all back in the case.

RealBeast

Titan
Moderator
Probably small. One screw should not make a motherboard loose though, rather odd. More likely a screw making a contact from the board to the case would short it and not allow it to start, just probably not fry anything with any luck.

And most likely one or more of the fans is not properly attached and is causing a short.

I would pull everything out carefully and do a bench build on a large sheet of cardboard, easier to adjust parts and no chance of a case short. If all goes well, put it all back in the case.

 
Solution

a3grimreaper

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Oct 24, 2015
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Well that eases my mind a bit. Now I just need to figure out what is the problem.

The specs are:
MOBO: MSI Z170A
CPU: Intel i5-6600 with a Gammaxx 400 cpu cooler,
GPU: a Gigabyte GTX 980 Windforce,
PSU: Corsair CX Series 600 Watt ATX/EPS Modular 80 PLUS Bronze ATX12V/EPS12V 552 Power Supply CX600M
two 8 GB RAM sticks,
a Samsung 840 SSD,
an ASUS DVD writer,

It wasn't until after I ordered the parts that I noticed the GPU requires 600W minimum, and a buddy of mine suggested that the on/off cycle is doing is caused by the PSU not being strong enough to support everything.

I'm not too familiar with PSU's, but if that's the problem, I would think that it wouldn't have started previously. Maybe someone can correct me on that.
 

RealBeast

Titan
Moderator
While not my first choice in CPUs (I would go with an EVGA SuperNova G2 or P2), I doubt that is causing your issue. I would do a bench build without the fans and get it running and then add the fans. Then when it is stable put it all in the case.