> Just an update from several weeks ago. To refresh, an Intel D845-wn P4
> motherboard. When cold start only this computer, the KVM (IOGEAR
> GCS612A) didn't switch on, but if 2nd computer powered up for 10
> seconds, and powered down, everything OK. After for restarts and brief
> power downs, all OK.
>
<snipped>

>
> At this point, I'm thinking it something that is beyond my capability to
> troubleshoot or repair, likely a new motherboard is going to be on the
> buy list.


Try swapping in a new Power Supply and test.  Before my P4 power supply
died, its 5V sourcing dropped quite a bit.

Ling SM
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