Originally Posted by BCVolkert
My Treo 650 was stuck on the endless loop trying to sync with the cradle (regardless of whether or not it was in the cradle). I tried all the resets and finally a hard reset seemed to take, but the the same old endless loop of wanting to sync resumed. I left the battery out for a few hours and then blasted the contacts at the bottom of the 650. The problem was over. It now syncs, makes, and recieves calls. My problem was probably caused by a day of yard work in my pocket that may have resulted in dirt or sweat in the contacts. The contact cleaner seemed to do the trick and did not seem to harm the plastic or finishes.
FYI my phone is from Cingular. I don't know if it is locked or unlocked. I suspect it is locked.
My 650 was also in the endless hotsync cycle. After an unsuccessful hard reset, Palm support told me I could send the 650 in for a $200 repair (as if!). BCVolkert's solution, however, turned out to work for me also. Like BCVolkert I had been carrying my phone in my pocket while doing yard work. I blasted the contacts at the bottom of the 650 with compressed air while brushing them with a soft brush. Problem solved! The phone has worked normally since, and I was able to hotsync my data back onto the phone. Thanks, BCVolkert!