On 11/25/2010 7:24 AM, David Duffy (AVD) wrote:
>
> What's really odd about this is that replacing the chip fixed the
> problem on the first faulty unit. Apart from those two units, all the
> others work well.
>
> I'd bet money that replacing the PIC will solve the problem, but I'd
> really like to know why before I do that. Since it is a TQFP package,
> swapping them back and forth not an option.
>
>
>   =20

When you swap out the chip you're also redoing all the soldering.
What if you run a soldering iron around all the pins to refresh them?
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.