Sounds vaguely familiar to a problem I had with setting internal MCLR  
and internal osc simultaneouly with a 16F819 some time back.  Could  
your problem be related to this?

Cheers,
-Neil.


Quoting Eric Wolf <eric.n5ebw@gmail.com>:

> Hi Everyone!
>
> Something very odd just started happening to my pickit2 programmer about an
> hour ago.  All of the sudden, it's destroying chips.  I'm using the
> PIC16F628A. and the software recognizes that I have inserted a blank micro
> with that model on it.  Program it once, and suddenly the device is
> unrecognizeable.  Interestingly enough though, if I power VDD to the unit,
> it will run the firmware on the chip with what seems to be without issue.  I
> just can't ever access the chip again.  It's very frustrating and was
> wondering if anyone experienced something similar?
>
> Thanks,
>
> -Eric
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