Now that I think about it the problem did start after I tried to set
up a circuit on my bread board for programing.   I suppose something
could have gone wrong there.

Should there be some physical defect with the diode after it blows?

Thanks,
Adam

On 9/17/06, Xiaofan Chen <xiaofanc@gmail.com> wrote:
> On 9/17/06, Steven Howes <steve@poundbury.com> wrote:
> > If you open it up i bet there is a surface mount diode thats dead
> > (a BAT54 i believe). I have toasted two of these (note, replacing
> > the part fixes nothing). Now using a PicKit 1. Works fine.
> >
>
> You probably do not use PICkit 1 with ICSP. If you do not use PICkit 2
> with ICSP but use an programming adapter, you should be in good
> shape as well.
>
> PICkit 1 supports much less PICs than PICkit 2.
>
> In my opinion, it is not really a good idea connecting PICkit 2 with
> target board which might overload the Vdd/Vpp lines.
> You can use PICkit 2 as an ICSP programmer but you need to be
> very careful. You can even use PICkit 2 and power the target board
> with its own power supply. But you need to be very careful. The
> overload protection of PICkit 2 is not so good.
>
> IMHO, it is best to use PICkit 2 as an off-line programmer.
>
> Regards,
> Xiaofan
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