I've got an original, Rio-brand tuner module in my car. It's been running percently since I got it three years ago. In the last week, it's started misbehaving.

When the car is cold in the morning, it will work fine. After three or four minutes, after it's heated up, it starts flaking out. The signal meter will go from full to nothing and back to full once or twice per second. You hear sound drop-outs but no scratchiness or other noises that would indicate a flakey connector. After the car sat in the parking lot for most of the morning and afternoon, I got about a minute of music out of it until it started flaking out again.

Furthermore, even with the car off and parked, the drop-outs still continued. This tends to rule out any connector issues. Could it be a heat-reated issue, perhaps a solder joint gone bad? Anyone else experienced anything like this?