New built computer won't turn on

Kitsune Blaze

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Jun 4, 2014
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4,510
A friend and I built a computer yesterday, putting together the following parts into the case:
ASROCK Z87 PRO3 motherboard
i-7 4770k processor
Geforce GTX 760 EVGA graphics card
2 x 4 PNY ram sticks (DDR3)
Coolmaster ELITE v2 550w power supply
1TB Seagate HDD

it was tedious, but after a good deal of confusion, we finally put it all in place.
we turned it on and everything seemed to work properly; fans were all powered and turning.
there was no image in the monitor, so after looking for the problem, found that the ATX power slot on the motherboard for the processor was an 8 pin, while the power supply only offered a 4 pin.... today, we went to Fry's and picked up a 3 dollar piece that turns a 4 pin to an 8 pin, and installed it.
nothing
this time however, there was no fans spinning... nothing!
we removed the piece and tried what worked before; nothing
we replaced the power supply with another that came with the case; again, nothing!
we rewired everything, checked for the switch to be on for the power supply, tested the outlet... everything we can think of.
we also went through a few online "troubleshoot" guides and none of them truly worked
we really need help here :c
we admittedly aren't experts, but were enthusiastic to tackle this until we hit a brick wall
...and now it's come to this.. x.x
we plan on showing it to a professional, but it'd be nice to have someone unbiased trying to sell me a new piece

we truly appreciate any helpful words in response to our predicament!!
 

hans_pcguy

Distinguished
Nov 13, 2010
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19,160
You can get the pin out by googling the motherboard. The wires from the PSU are usually color coded. Yellow or orange is 12 Volt, Red is 5 Volt, and Black is ground. Make sure that the socket on the motherboard is getting the right voltages in the right sockets. Not all of those plugs from the psu are for the motherboard. Some are for GPU's and they are wired differently. If that all checks out correctly, you could have a different problem entirely. You may have to use the process of elimination to find the problem. To do this, start by disconnecting everything except what is essential to boot the PC. For example, one stick of ram, no drives etc.
 

Kitsune Blaze

Reputable
Jun 4, 2014
2
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4,510


that's one of the things that was suggested i do, but even with the core components, nothing would turn on.