Chosen Solution
I just replaced the display for my Series 3 42mm Apple Watch, and it still seems to not turn on. I do not get any vibration from force restarting, would this be caused by a bad battery or flex cable perhaps?
Hello it’s very hard to say what’s the problem. The best situation should be that you check the new screen on another watch. If it turn on I should say 90% sure cables. Watch worked few days ago? Than the battery should be fine.