I can’t confirm this to be true but there could be something wrong with the screen. You say its charging but doesn’t turn on so I assume there must be something wrong with the screen as I’m pretty sure they are sort of connected. However, you shouldn’t jump to the conclusion that the screen is broken as it’s probably best for you to see a professional. I have a question to ask, when did the phone stop turning on? e.g, when it ran out of charge or if it randomly turned off.