Radio problem
 

This morning my radio began "resetting itself". At first I thought it was a power issue, perhaps a short, but the clock and all of the presets are still intact. What happens is this. The radio loses the station and all I hear is static. Simply by pressing the preset the station is back. This morning it only happened once, however, this afternoon it seems to be happening every few minutes.

I have a 2007 9-3 2.0T if that makes a difference.

I would appreciate any suggestions you might have.

Thank you very much.