Ursprünglicher Beitrag von: Paul Hitchens ,
This has happened to me several times. What works formy watch is to push and hold in the light button for about 20 -25 seconds. It will then reset and start up as normal. You have to be patient when pushing the button but it does work. The other way is to connect it to a lap top and reset but I am not sure of this process. If above does not work you may like to try this and see where it takes you.