Grounding Problems Mounting Motherboard

[JonothanE]

I previously had a motherboard which i mounted in my case on metal supports, I just got a new motherboard which whenever i mount on these supports has grounding issues and doesnt give any video output. Does anyone know the proper way to insulate the motherboard or do i need to buy supports that are composed of a non-conductable material?

thanks,

 

[electronicsfreak]

I would reccomend buying the plastic supports that screw into the holes. They support very well and do not cause any shorts.

 

[mainegeek]

JonothanE,
Standard brass stand-offs should work,also make sure that you don't have an extra one placed where it doesn't belong.

If your case uses the square tin "clip on type" stand-offs,
then you may need to cover the tops with a non conductive material. I have used tire patches from a bicycle tire patch kit. Take a paper hole puncher, put a hole in the tire patch, place the patch over the top of the stan-off centered with the screw hole, then trim the excess off around the edges with a razor blade. It basically creates a self sticking non conductive rubber gasket.

 

[edfair]

I've used electrical tape, doubled over long enough to cut a "v" into the fold then unfolded.
Also, don't overlook the possibility that the screw head is making contact with a trace.

Given the choice between plastic supports and insulated metal, I would choose the insulated metal. Sliding the board into position and back out can be difficult with the plastic ones.

Ed Fair
Give the wrong symptoms, get the wrong solutions.

 

[paparazi]

There should be know need for insulating these posts but if you feel it's necessary then simply super glue those supplied? fibre washers to the top of the posts.

I still recommend leaving at least one post "BARE" for proper board grounding, as it should be, although the board does get a ground through the main power lead as well.
Martin

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