Audio problem with tuner 1

[shellbmb]

I've search and found nothing on this. Has anyone had problems with the audio coming from tuner 1? There is a crackling or popping sound out of all outputs with tuner 1. The optical, RCA, and coax out all have this popping sound. Tuner 2 is fine. Sometime if I unplug it and reset, it will fix it temporarily. But the problem soon comes back. Any suggestions before I call dish and take a chance with their service?