Rebooting continuously. How to replace power switch?

Samsung Galaxy Tab Pro 8.4" is rebooting continuously.

Have tried complete reset by wiping out data. The Battery has full charge. But it keeps happening.

My suspect is the power button. I think it is stuck and hence would like to replace the switch.

Kindly suggest me other alternatives to debug this problem, and also let me know how to replace the power switch.

Thanks.

Regards.