Solved: Computer restarts with static shock

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FarRed

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Oct 24, 2006
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Anyone seen this? Occasionally, I'll get a static shock when I touch my PC case and it reboots. Less often I get a small shock off the mouse, but nothing else happens.
 
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It sounds as if there is a live connection between your PSU (Power Supply Unit) and your case. When you touch the case you earth it and it stops the flow of electricity from reaching the motherboard so it restarts.
 

FarRed

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Oct 24, 2006
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I tried a new power supply, disconnected the speakers (made a funny sound), and disconnected the reset button on the front--no help.

I can restart or start the computer fairly consistently by touching the front grill on my case (Cooler Master http://www.newegg.com/Product/Product.aspx?Item=N82E16811119199). not the metal case, just the grill work.

I'll try the extension box/surge protector next.
 
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I have had a little think about this and I was wondering whether the Motherboard is grounding against the case. This is then earthing it when you touch the case making it restart. Other than that I can't think what it could be.
 

FarRed

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105
Thanks. I thought the MB was always grounded because the screw holes always have metal foil. I find it odd that I can touch the case and it does nothing, only the front grill work. I'll keep looking.
 

FarRed

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Oct 24, 2006
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105
Here's my theory--the front bezel is plastic, isolating the metal vent form the rest of the case (which is grounded properly)--thus a floating ground. The only path to ground is somehow thru the front ports and the motherboard. The MB interprets the static voltage spike as a reset command. All I have to do is figure out how to ground the front.
 

FarRed

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Oct 24, 2006
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I attached a small wire from the isolated metal mesh in the bezel to the case. So far, no reboot. Crappy case design, but I guess that's one of the joys of home build.
 
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oh yeah you can never have too many computer parts laying around. You never know one day you may need them. That is what I am like. I sell a part and then need it about 4 days later.:rolleyes:
 
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