Re: Can my CNC controller blow my motherboard?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "mrgamber" <mgamber@c...>
wrote:

>
> I have a problem and am looking for advice. I have two motherboards
> fail on my CNC setup and am starting to suspect the controller. The
> first MB just died. Would not boot. I have no idea why or when this
> happened as I came in one day and it would not turn on. Got it
> replaced under warranty. Replacement MB lasted about an hour and

the

> keyboard quit working. Now when it boots, it sounds like a stuck

key

> error (clicking) and computer says no keyboard present. I have

tried

> 3 different keyboards both USB and PS2, but none works.
>
> Can there be something come back through the controller to cause

this?

>
> Here is my setup;

On a modern motherboard all the peripherals like USB and keyboard
live on the same chip known as the North Bridge (could be south doubt
it though), chances are if something nasty is comming back up the par
port it would cause this sort of error. Run a meter across the lead
(google up the wiring for a par port) and see if anything untowards
is there - its possible that you're feeding 12v at a high current up
and frying your system