Firstly, ensure the crown is pushed all the way in, as the watch will not function when the crown is pulled out. You may need to do this when you first wear the watch. Otherwise, most often the issue will be as a result of needing a new battery. You can take your watch to your local Michael Hill store, or to any watch servicing location where there will be a small fee for battery replacement. Don’t forget to request the pressure test so it remains water tight.