I bought my Garmin forerunner 220 only a few months ago and it's worked fine until yesterday.
I thought it was that the GPS wasn't working at first (it showed being connected) but when uploaded it shows the map I ran but not the distance, pace or elevation. Today it was one step worse - it didn't calculate the heart-rate accurately, it's showing I basically didn't break a sweat (which deffo wasn't true).
I deffo haven't ran enough for the memory to be full. I also tried to connect it to see if there was an update required but there was none available.
What's going on? Please help!