2009 Lexus RX350 Radio only has static

[Rajiv]

I have a 2009 Lexus RX350 - now out of warranty.  The radio was working fine but suddenly all I got was static.  I couldn't use any of the controls on the radio itself but could use the steering wheel control to adjust volume and turn the radio off.  Navigation seems to be working.  Has anybody experienced this? It doesn't sound like a fuse or amp issue but an antenna issue maybe?  Any ideas would be appreciated.