Re: PC is dead after installing new board

Mike Hollywood wrote:

why not just omit the offending screw?

I'd be willing to bet that, even though I'm sure he's checked, there's a standoff in the wrong place underneath as it's easy enough to do.


"David Maynard" <nospam@xxxxxxxxxxx> wrote in message news:11h222rd4k98ea7@xxxxxxxxxxxxxxxxxxxxx

Bob H wrote:


Can you tell me what a single point ground is in realtion to a motherboard? Does it mean only one connection/standoff should be ground?
Thanks

You can ignore that as modern motherboards intentionally have multiple grounding points.


w_tom wrote:


 The proper way to mount a motherboard to that plate is the
single point ground.  Only one connection from motherboard
ground to steel plate.  All others should be non-conductive
(ie nylon).  The single connection from motherboard to chassis
is located adjacent to were IO and power supply connections
are located.  This makes the entire system less susceptible to
crashes due to transients such as static electric discharges
to the case.

 Intel even has specs for where this single electrical
connection should be located.  Defined in a technical
descriptions for how ATX pc board layout.  Long since lost the
spec, but the principles are well proven.  Motherboard should
have only a single conductive connection to its mounting
plate.

Bob H wrote:


OJ, yes it certainly is somewhere. I have insulated the screw mountings
and put it in, then tried it after each screw, then I found that the
short is bang in the middle somwhere, because if I put a screw in the
middle, it goes dead,but when I take that screw out it works ok.
Thanks







.

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