Jhenry

I have a 2008 Lexus RX 350 and last night, my radio screen was scrambled. The radio still works, however, you cannot change the station with the buttons. The only way I can do that is by using the buttons on my steering wheel. I cannot turn the radio off. By the time I got the work, the scrambled mess was down to a few letters and the rest blank. Any idea what is going on with it? The navigation is working fine.