My 830 was dropping all of my sensors . I did a reset and updated the software and reinstalled sensors, but the heart sensor (18 months old) can not be "found". I have cleaned it etc. Could a heart monitor battery be dead after 18 months or is there a deeper problem with the 830?
I also keep getting "Sensor software update" notices but when I try and update, after waiting a while I get the messages that "Contact failed".
Any advice?