Quote Originally Posted by Kamikaze47 View Post
I added a pullup resistor to PORTA.4

It's definitely the osc because if I leave it running for 15 mins or so it does eventually display "Hello World!" extremely slowly.
I think so ... now.
Xtals also can be a bit lazy ... depends on the " cut "

don't you have a 12 or 16 Mhz Xtal ... ( I recently saw a 18F overclocked @ 80 Mhz !!! ... ) 48 Mhz is easy, 64 might work.

Alain