Hello, i have problem with my forerunner 945. the problem is the sensor hearth rate under the watch not blinking, so it cannot record anything. it happened 3 times. the first time, i reset internet connection in my phone, and the sensor blinking again. the second happened , and i solved it by changing wifi conn at watch. but the problem( sensor not blinking happen again, i tried again like before, but it was not working, anf my HR censor not blinking. could you give me suggestion?