Why is there no sound using any radio settings FM, Aux, or CD? on 2008 Dodge Avenger

We have power and the clock works. We have checked the connections behind the radio and the fuse. All seem fine. When the problem started 8 months ago, the radio or CD would just cut out and go to static but would work again after restarting the car or some time passed. The working time got shorter and now no sound at all.

Asked by for the 2008 Dodge Avenger