Radio shuts off after 5 seconds in 2009 Hyundai Tucson

What could be causing my radio to shut down after five seconds? If it was the fuse, it wouldn’t come on at all. I suspect the amp/power supply. What else could it be? I think all of my radio stations have been reset too.

What do you do to get it back again? That is, does the power go off to the unit, or does it just stop producing sound?