Are you not able to start your laptop through the power button? Or you have started your laptop but after working an hour, now you’re not able to turn off your laptop?. Well you might be trying to make it turn-off, but even after pressing the button for a long time, it doesn’t work out.
Well there is no fixed time for hardware when they stop working, the only thing you can do is care. Also it’s not advisable to remove your battery to turn-off your laptop, you might lose all your current data, also not sure what more damage it can create.
So better is to look for a verified technician to help you out. So what are you waiting for? Check it here.