Hi Joel. Welcome to our little corner of the 'net.
Can you still turn the collet? If so, then nothing broke inside and jammed things up. I'm pretty sure there is no "switch" but there might be an internal fuse. Some tools will have one, not sure about your Bosch. Not difficult to take apart if you have a little knowledge of "how things work". If not, as Charles suggested, a repair shop might be in order.
Sometimes I wonder whether the world is being run by smart people who are putting us on
or by imbeciles who really mean it.