I bought a Garmin 510 premium bundle 4 weeks ago today. In the first 10 days I used it 5 times and 4 out of the 5 times both the heart rate and cadence stopped registering at exactly the some point, somewhere between 10 minutes and 2 hours into a ride. I took it back and 14 days later it came back with a new heart rate monitor and cadence/speed sensor. Seemed strage to me as the problem must be with the head unit, anyway I used it a gain yesterday and exactly the same thing happened. Heart rate and cadence stop registering at the same time. Speed (GPS) time, distance, elevation, temperature all continue to register for the duration of the ride, I even produced printouts of the rides showing the problem to the shop which they sent to Garmin. I'm now waiting for Garmin to decide if they will replace the whole unit or give me a refund. Prior to it going back the first time I did update the software, did factory resets, the guy at the shop checked the cadence sensor and I had it set up right, so all of those things have been checked.
Has anyone else experienced this problem.?