Finaly had some spare time today and tried Wilbas suggested method of testing the core crystal/caps. I used the proved working pic #2 and put it in proved working CORE3 with crystal/caps (pin 13 and 14) of CORE4. I got a "ready" message and was very :) the method worked! Then tried non-working CORE2 with crystal/caps of CORE3 and got a "ready" message!! So at this point I thought the problem was solved. Bad crystal and/or caps in CORE2. But for a final test I tried to put the pic in CORE1 and us