RXVI can’t off/on

Does anybody have a problem where sometimes the power button doesn’t work and the camera just doesn’t off/on? Sometimes when I press the button to off or on the camera, nothing happens. Even when i long hold the button, the camera is dead. I usually just wait it out for a good 30mins-1hr before the button works again. It’s getting kinda annoying and i don’t know what’s wrong with it because it happens randomly. The camera is fully functional, even when it is unable to off itself. How much will repair take?