>>The biggest problem with the ICD2 (and any other PC-based programmer) is
>>that since the GND supply is fed from the PC, there can be a ground loop
>>through the AC cord of the driving PC and the GND of the
>>workbench, etc etc.
>>
>>You should always clip a GROUND clip from the ICD2 to the unit being
>>programmed IN ADDITION to the single, tiny, feeble telephone jack GND pin.
>>
>>--Bob
>>
>
>
> Something else to look at in the morning.  Gosh, this seems so obvious and
> simple!
>
An AC ground loop will kill chips faster than anything I know of. Betcha
the best steak dinner in town that'll fix it. Its happened to me a few
times. Once- in the SAME office- two branch circuits' GROUNDS were 6V AC
apart from each other... easy to happen in a manufacturing facility.

Always look for the simplest explanation, it's usually the right one.....

--Bob

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         Bob Axtell
PIC Hardware & Firmware Dev
   http://beam.to/baxtell
       1-520-219-2363

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