Built new PC, no power whatsoever, shorted out

rpeopler

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Dec 8, 2012
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Yesterday evening, I built a new PC. For some inexplicable reason, it was not receiving any power (No fans, no leds, no motherboard beeps). Everything was wired properly, from the 24-pin connector and 4-pin connector to the headers and all. I didn't insert the GPU yet just so I'd have some extra room to work in. Because I didn't have any spare parts, I brought the PC to a local computer technician so I wouldn't have to individually RMA each part until I pinpointed the issue.

He initially couldn't get it to power up either, and used some device to send power into the PSU to force it to power on. As he did so, the PC shorted out and began smoking. I was scared to death and thought the PC was toast. However, we didn't really see where the smoke originated. He used a spare PSU and the CPU fan powered up correctly (he didn't test for video or anything for whatever reason) and claimed that the PSU was likely the issue.

However, before I RMA the PSU, I'm curious: could the motherboard/CPU be damaged? Could the motherboard be faulty as well? Anything else I should check?

My specs include:

NZXT S340 Mid-Tower Case
MSI H110M Gaming LGA 1151 MOBO
Intel Core i5-6600k
2x8GB G.SKILL Ripjaws V DDR4 2600MHz RAM
Seasonic S12II 620W Bronze non-modular PSU
3TB Seagate Barracuda ST3000DM808 HDD
Not in build yet:
PNY GTX 1060 3GB
Windows 10 Home 64-Bit
 
"He initially couldn't get it to power up either, and used some device to send power into the PSU to force it to power on"
It was a mistake, in my opinion. If a short detected, the board does not send the "ok" signal to the power supply, for protecting the system. Forcing the power supply to start might damage the components due to the short.

"he didn't test for video or anything for whatever reason"
Probably he realized his mistake.

I'd RMA the motherboard too and hope that the CPU was not damaged.
 
There is a good possibility that mobo is down. Your setup is bit odd. H110 board with i5-6600K not a good idea as you won't be able to Over Clock it. So, if possible send that mobo back or get it replaced with a Z170 one and this time go for ASUS or Gigabyte board instead of MSI.
 

rpeopler

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Dec 8, 2012
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All of the motherboard standoffs are properly secured, omit one in the center where a screw thread is coming through the hole (and is virtually impossible to remove). The CPU fan was spinning when he used the alternative power supply... though I suppose I can't really be certain nothing else was broken.