So the watch is less than 18 months old. It's been doing weird things lately and today it's finally hit the wall. It went flat with 50% battery or so at lunch time so I charged it in my car. Went to swim tonight and turned it on. As soon as I tried to navigate to start the swim and pushed the down arrow it went to a black screen and turned off. The same happened with the up key when I turned it back on. Is it worth going to the effort of doing a full reset?
Garmin Forerunner 735XT