> RA4 would only assert for a few 10's of
> micro seconds, then return to zero.

I'm not sure what you mean by this.  Since RA4
is "open drain", it can only drive a 0, not a 1.
Writing a 1 to RA4 in software sets it to "high
impedance".

In any case, you said this worked on your breadboard,
so I suppose it's not related to your problem?


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