Different Audio Controller Issues

[jrange]

I've got a 99 venture - never had any problems with the audio system 'till now. Two things showed up within days of each other. 1) the up selector on the controller quit working and scrolling down works on station selection but when I do it with something like bass, I can't go back up, then 2) a few days later the audio started to just cut out, on the radio and aux - no static at all - just gone then back. I noticed that the CB RX (receiving) indicator comes on when it cuts out and goes off when it comes back. Finally, it happens a lot under 40 mph and just occassionally above 40 (weird!). I'm gonna try disconnecting the antenna as I never use the CB anyway, but was wondering if anyone had any experience with this or suggestions.

[royalstarjac]

Is your cb on all the time? Try turning it off.-Jack