Power button is very tight and doesn't do anything, what do I do?

I got my tablet fixed for an unrelated issue all the way back in 2019 in India. Following the fix I had moved to Australia but during that period I had noticed the power button was slowly getting tighter and harder to turn on. I found the tablet in my house again and it has been dead for 6 years but the last time I charged it, the screen did show the charge status you'd see when you charge it with no power. I tried charging it today but I am unsure if it's a faulty usb cable or if the connection is dead. The power button is still very tight and doesn't seem to do anything when held down, unsure if it's even going far enough to turn on the tablet.