1.) Go to Control panel
2)Click on Hardware and sound.
3)Click On Power Options.
4)Click on choose what the power button does.
5)Click on change settings that are unavailable.
6)Uncheck Turn on fast startup.
If you follow this list it should fix this issue for you.
Did you try a sledge hammer yet? In all honesty, just take it to best buy or something and ask them to fix it. I think it is a hardware error, so there is really nothing we can do here.