Yes, I admit I was checking the voltage on the inside side of the  
diodes with my multimeter (digital) set to AC. I just rechecked with  
it set to AC and the reading is still in the millivolt range.

If the diodes are indeed the culprit, I find it strange that both  
diodes would be open?

As for the J8 connecter, it basically looks new, no dirt, or burning  
at all.

Phil


On Aug 9, 2009, at 10:01 AM, Ethan Dicks wrote:

> On 8/8/09, William Levak <wlevak@sdf.lonestar.org> wrote:
>> Also check the obvious,  are the pins for the plug clean and making  
>> good
>> contact?
>
> The plug is a good place to check for high resistance or loss of
> continuity.  I've seen plenty of those plugs (on PETs and on other
> machines) cook - brown and black plastic, oxidized pins, etc.
>
> Too many amps leads to heating leads to oxidation leads to resistance
> leads to more heating, etc.
>
> Fortunately, the connectors are still quite standard, so it'd be easy
> to replace the end of the cable (the pins on the motherboard are
> rarely permanently damaged, but make sure they are clean and bright -
> if not, they aren't difficult to replace or expensive).
>
> -ethan
>
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