Anyone have any issues with a FTM-100DR speaker audio? I think I have a cold solder joint somewhere based on the symptoms. If I turn on the unit and the car temperature is HOT, then it powers on works fine with audio coming out of the speaker. If it cools down or have been running the AC then turn on the unit, no audio. If I plug a set of external headphones up to the unit, the external headphones work every time. Thoughts? Any help is appreciated. I was looking at the service manual, looks like everything related to audio out is on the back side of the board. Doesn't sound like a blown component because it works when it's hot.