The sound goes in and out when the cd/aux setting on radio is on.

My 2006 Town and Country came with a drop down cd player and sat. radio. When I try to use either of these features the sound comes and goes until the car gets sufficiently warmed up, usually an hour or so of drive time. Both features are turned on using the same button on the radio. The picture for the DVD stays on the whole time. Every other feature on the radio panel works as normal. The weirdest thing is that sometimes the features work fine for about a day.