Alpine CDA 9835

I've had the Alpine CDA 9835 for a while now and never had a problem until tonight. I have Sirius hooked up to it even though it only shows displays for XM. I was driving and it was working fine then all of a sudden, the XM wouldn't turn to Sirius and none of the buttons were functional except the Source/Power button. The buttons all make sounds but are not working. I hear static coming out of speakers so it's not a speaker issue. How Do I reset the radio? What can be happening? ANy help would be greatly appreciated.