My power button does not work at all

The tablet charges normally but I can't turn it on, the power button does not work. I always had a problem with having to press it hard but now no matter how hard I press I get nothing. The screen lights up when I plug it in and shows the battery icon with the percent. I've replaced the plastic button before but now I don't know what to do. I've even tried pressing the button from the inside (without the plastic button) and I get nothing. Is there something else that can be replaced to fix it?