My lg g stylo power button doesn't work

Taking off the back and taking out the battery for 15 seconds worked for me. I also noticed that the battery symbol showed it as charging, even off the charger, so that mustve been the glitch.

Try updating Android. That actually worked for me.

Mine does that too… just keep plugging and unplugging the charger in a bunch of times and it eventually turns on.

I was having the same issue earlier today. Tapped the power button repeatedly about 20 times out of frustration then held it down like usual the last time & it started working again. Must be a glitch or something. Hope this helps.

I had this problem. But I updated Android and that fixed it! Believe it or not. It was my last resort.