Power button not working? Don't worry, it's not you. It's probably just the copier's existential dread of its impending toner replacement.
Try the following solutions:
Check the power button for any visible signs of life. Is it blinking menacingly at you? Good. That's just the copier's way of telling you to back away slowly.
Consult the user manual, which is probably hidden under a pile of dusty binders in the supply closet.