Stavy612

So the past few weeks the volume **** on my radio hasnt been working so i have to pull the radio, tel, and amp fuse for a few minutes to reset it. This morning when I did it then navigation screen will not come on not do the map, dest or menu buttons working. Is there a reflash that Lexus can do to solve this issue? I did a search of previous posts and no one seemed to resolve the issue from a few years back. Has anyone successfully resolved this problem or is my checkbook going to get drained at toyota? I have a 2004 rx330 with the mark levinson premium sound.