2008 6 CD changer radio. Here is the problem when you start the car the radio does not come on. It may take 10 to 15 minutes depending on the temperature. If it is hot outside and the car has been in the sun the radio will come on when the car is started. If the temp is cooler it will take a few minutes to start up. When it starts it works just fine. To me it sounds like a cold solder joint in the head unit but just wondering if anyone has had this problem, and what it took to correct it.