> Pardon my comandeering of your thread, but since you mention hardware
> failures, I had a PIC 16F872 fail on me recently in an odd way ... RB0 froze
> at logic "1".  I checked the circuit carefully, but did not find any shorts
> or other problems.  RB0 thru 4 drove the base of some 2N3906 transistors via

The only way I locked a pic like that was when I was driving a transistor
through a "zero ohm" resistor...:)  And even that took a while.

I know you already checked the circuit, but are you sure it's a 1k
resistor?

Let us know if you figure it out..

-Steve

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