the fuse puller is located in the fuse box in the engine compartment....Hi! I had a similar problem this week-end, more than 4 years after purchasing my Elantra GT 2013 (in Canada, in case it makes any difference). When I started the car, the radio "jammed"; no radio-related button was working, there was just no way to use the radio, and the clock was stuck to the date & time at which I started the car. Most importantly, the clock screen was not turning off when I was removing the key from the ignition, there was no way to shut this down! The next day, my car was still showing the date & time of when the problem started!! I was able to fix the problem by removing the fuse marked at "MULTIMEDIA" (for 30 seconds), and inserting it back on. It solved everything. I wanted to share this experience in case it could help anybody.
Note: I didn't have the right tool to remove the fuse, but long-nose pliers worked perfectly.
I have 2013 with a Nav system - bought new in 2012.
In 2016 i had my first issues with the back-up Camera display... put the car in reverse, and the screen was black except for the coloured lines that show up on the display to guide you. Put car in drive, the radio display didn't show up either.... stayed black. Happened twice over a couple weeks. Both times, shutting down the car and restarting cleared the problem. Wasn't the camera itself as far as I could tell. It was functioning well at the rear.
Power switch on the radio did not help. I will remember pulling the fuse if it really becomes stuck.