Yesterday my Instinct Solar started to freeze up and I only noticed this because it was 20 minutes slow. I was able to get it turned off but then it didn't want to restart. I was eventually able to complete a soft reset only to have it get stuck on the Garmin screen. I was then able to get a hard reset and was able to see the screen and it was accurate for a little while. It would restart and get stuck on the Garmin screen at random. Was able to get it operating normally before I went to bed, when I woke up it was 40 minutes slow. Again with the resets and I was able to get it to connect to Garmin Express but it wouldn't show the correct date or time. When i disconnected from the computer it alerted me there was an update available, all the buttons worked except for the GPS/Select button. After additional restarts with all other buttons working except for the GPS it now will not even turn on regardless of buttons pressed and if it is plugged in or not.
This watch has been very good to me but I haven't done anything out of the ordinary and haven't tried to record a workout in weeks.