Computer might be shorting?

Nebtuu

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Oct 29, 2013
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Hi everyone!

I bought the components for a computer earlier this year, and the experience has really brought me down. Originally I threw everything together and it worked. Yay! Three days later, it wouldn't turn on. I spent dozens of hours fiddling with unsuccessfully.

What would happen is that the breadboard worked fine, then I put it all in the case, and nothing would happen when I tried to turn it on. I used a screwdriver to short it; the blue LEDs would flash and then nothing. No fans moving, and when I tried again, not even the LEDs would flash.

Eventually I wondered if it was a problem I couldn't see - perhaps it was the Hyper 212 Evo's backplate? I replaced it with the stock cooler, and it worked. That was February. I've had absolutely no problems with the computer since. So it was the backplate making contact, right..?

Recently I treated myself to an SSD for a few games and the OS. When I went to insert the SSD, I noticed some dust near the front fans. I removed the RAM, the PSU & the video card. After taking care of the dust, I put back the PSU & RAM. And... here we go again. It won't turn on. :(

The PSU is turned on. The CPU cable is plugged in, the motherboard's power connector is in and the CPU's fan is plugged in. I assume that something is shorting somewhere for some reason, but what exactly is going on or why eludes me. The graphics card hasn't been put back in yet.

tl;dr: Everything's plugged in, haven't fiddled with the standoffs since it worked. The first time it happened I RMA'd the motherboard and bought a new PSU. Didn't help. Very confused. :(
 

Tedfoo25

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Jun 3, 2013
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Very odd. Do you have AC with metal grates or live next to a power plant? These will both cause charged dust to be flying about which can get in the contacts when you take out parts.

Also, use a multimeter to check your wall socket is running at the correct voltage/current. Old houses can have poorly fitted mains. Also make sure that your PSU has sufficient wattage and is not unbranded, as well as for water in the case of course (eg due to condensation).

Report back, and we'll see if we can resolve your issue.
 

spat55

Distinguished
That is very odd like Tedfoo25 said, not to sure what to say but will keep an eye out here to see what happens. Have you tried breadboarding it again? Could it be the PSU playing up? Try removing all the less important parts, use one RAM stick, remove all the drives and see if you can get into bios, just use the bear minimum and start reintroducing stuff it if starts working.
 

Nebtuu

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Oct 29, 2013
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Thanks for the response!

I don't live near a power plant or have AC, no. I don't have a multimeter, but I'll buy one the next time I'm in town. I feel that I would've noticed moisture when I was removing the dust, and the PSU is a Corsair GS 700. That's probably twice the power my build needs, but I wanted to get more than required so I'd have room to upgrade in the future.

Here's a link to my build: http://uk.pcpartpicker.com/p/2lial


Edit: Sorry spat55, hadn't seen your post!

I better take my dinner out of the oven - as soon as I'm finished eating I'll try breadboarding again and see if it helps.

Thanks for taking the time to help! :)
 

Nebtuu

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Oct 29, 2013
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So I've spent a few hours at it.

Breadboarding worked fine, put the bare essentials into the case, worked fine. Hooked up the rest of the RAM, the video card, the HDD and everything seemed to be okay. Then I connected the PSU to one or two more case fan connectors on the motherboard, put the spare cable into the case (non-modular PSU, sadly) annnndddddd it didn't work.

I unplugged the case fans, took the spare cable back out of the case but the damage was done and my computer decided not to boot again tonight. I'm sure it would work if I started all over again, but I'm tired and I've suffered enough disappointment for one night.

The frustrating thing is that I learned absolutely nothing about what's causing the problem. It worked... until it decided not to. :/
 

Nebtuu

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Oct 29, 2013
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I'm a whole new kind of idiot. :(

After testing all of the components, I would just lazily plug in everything else without really thinking about what I was doing. The reason it wouldn't boot was I was using the motherboard's fan connectors while also using the molex connectors to directly connect the PSU & fans. In my defense it never told me not to plug in everything *twice* in either manual (probably because it was considered a little too obvious...).