The smartwatch stopped showing heart rate , the pulsing green lights have stopped working. The steps counter however is working and time is shown correctly. Any suggestions ?
The green lights are what collect the heart rate data. LEDs are shocking reliable, but the drivers that switch the power often are not. I doubt that there is a way to repair it in a modular fashion.
If the heart rate monitor is important to you, you should replace the watch.
1 
Is it under warranty? Reviewed the manual? Tried tech support (online, email, call center)?
F Dryer さんによる
The green lights are what collect the heart rate data. LEDs are shocking reliable, but the drivers that switch the power often are not. I doubt that there is a way to repair it in a modular fashion.
If the heart rate monitor is important to you, you should replace the watch.
Dan さんによる