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Computer Restarts Upon Touch

post #1 of 17
Thread Starter 
PROBLEM SOLVED THANKS TO Mattb2e: UNPLUG THE RESET CABLE FROM THE MOBO!

I've recently built my first ~$700 gaming rig, and it's been working perfectly fine except for this one annoyance.

Practically every time I touch it (like, press the power button, plug in a USB Flash Drive, etc), the computer screen goes black (fans are still running) and it reboots after a few seconds.

The computer is located under my desk, and the temps for the CPU and GPU are pretty normal (42C load for CPU, 71C max while playing Mafia 2 for GPU).

The PSU is plugged into a surge protector, which is plugged into this plug in the desk which is plugged into a wall socket. There are no flaws in the internal components (I think) besides this:
building007.jpg

There seems to be a wire missing in my 24-pin connector thingy. Could this be a grounding wire or something?

Also, could these odd resets cause damage to my computer?

Thanks in advance!
Edited by GuardianDuo - 1/14/11 at 3:10pm
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post #2 of 17
Missing a pin doesn't sound good. Did you install the brass standoffs into the case, or did you screw the motherboard directly into the case? The latter will cause shorts.

The 24 pin cable should look like this:

normal_atx_wm.jpg

and these are standoffs:

Brass-Stand-Off.jpg
post #3 of 17
I don't know off the top of my head whether the 24-pin connector should have a wire there or not.

Did you make sure to use all of the motherboard riser screws that came with your case? Definitely sounds like a grounding issue, but I have no idea why the computer would work without any issues until something is touched/plugged in.

Have you ran in safe mode and tried to repeat these things, just in case it's not an OS issue?
    
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post #4 of 17
The missing wire is the -5v rail. Those were eliminated in all PSU's around 5 years ago. Nothing to worry about. Nothing uses it anymore......except my OCZ DDR Booster.
Your touch/reset problem is a grounding issue. Static is being discharged from your body through your rig.
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post #5 of 17
That or your rig is not grounded properly... check your links. Be sure that all the connections have 3 prongs (i.e including the third grounding prong).
post #6 of 17
Quote:
Originally Posted by xd_1771;11930212 
That or your rig is not grounded properly... check your links. Be sure that all the connections have 3 prongs (i.e including the third grounding prong).
Exactly what I meant.smile.gif
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post #7 of 17
Thread Starter 
Yep, used the standoffs (read about people's rigs getting melted or stuff if the standoffs weren't used, and I assure you my case is still solid and not molten. Screwed them in and then mounted the motherboard with more screws), and the 3 pronged PSU plug is plugged into a 3 prong socket in the PSU which is plugged into a 3 prong socket in the desk which is plugged into a 3 prong socket in the wall.

Thanks for reassuring me about the missing wire, but if that's not the problem, then I do not know why my rig is not grounded properly.

Any other speculations?

EDIT: Have not tried running in safe mode due to my belief that it is a grounding issue. At first I thought it was due to the missing wire, but Mr.Scott has reassured me that that is not the case.
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post #8 of 17
I had read of this problem the other day, on two seperate threads. Both as random as you could imagine. To my own amazement the same thing happened to me with my HTPC. I recently set it up, went to move it to gain access to the rear to install a flash drive, touched the I/O shield and BAM, system shut off.

What I found in one of the two previous threads is that the static discharge someone trigged the reset button on the motherboard, and that unplugging the reset switch from the the motherboard header solved the problem.

Obviously I dont know if that will work for you, but if you can duplicate the problem, then its worth a shot.
post #9 of 17
Quote:
and the 3 pronged PSU plug is plugged into a 3 prong socket in the PSU which is plugged into a 3 prong socket in the desk which is plugged into a 3 prong socket in the wall.

But if the 3rd prong in the wall socket isn't grounded (as a lot of the time it's not. Being in the construction business, I know this.), then none of the rest is.wink.gif
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post #10 of 17
Quote:
Originally Posted by Mr.Scott;11931150 
But if the 3rd prong in the wall socket isn't grounded (as a lot of the time it's not. Being in the construction business, I know this.), then none of the rest is.wink.gif

that third pin is there for a reason...
unless construction workers intentionally do not ground it...
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