This is the typical symptom of a PIC (or other CMOS processor) not starting from Reset. If power comes too slowly or if it does not go low enough to make the internal reset circuit notice it is low then the processor will start (or continue) execution from an undefined state. To confirm, use a reset button temporarily mounted on MCLR. If this always fixes the problem, then a reset monitor or watchdog on operation is a good idea imho. Peter -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body