My kindle makes a sound when power is pressed, but won't turn on.
I accidentally left my Fire HD8 under a comforter while charging it; I’m pretty sure it overheated. There was something that looked like condensation on the edge of the screen, but after the kindle cooled down the screen looked normal again. When I press the power button, though, it makes a ringing sound but won’t turn on. I took off the back cover, but I don’t know what the problem is. Maybe battery, but I’m not sure. What should I do?