Please click the link below and download "1S manual" and "EN/RU/JP/KR" to solve your problem. https://drive.google.com/drive/folders/1FYszCLMlVZ74nvFde6shG7acrV_eWsLi You can get back to me here if your problem is not resolved.
I'm having the same problem too. I had it for 14 months. It only has green light. It doesn't reset, no sound, no wifi detected on my phone. I've tried the upgrade but nothing happens (it did not update) and I've change the battery too.