Hello, I have a Z130BT and recently all my A/V controls (bass, treble, balance, fade, etc.) have stopped working and are completely grayed out. In the home menu, when I touch "A/V", it goes directly to the radio/cd/etc. screen. This happens when parked so I do not think it is the parking brake or anything, although I am bypassed. It all worked before and there are no other issues with the unit. I have done a search and could not find any related info to this issue. Thanks in advance for the help.