i have a sirius stiletto 2 which i normally use docked in my car...well recently it lost ALL sound? If i take out the battery and reset it is will come back sometimes for a minute then go "mute" again...it shows the author/song so it is getting good reception...software is up to date...it does the same thing whether the battery is in out out while docked...if i undock it and plug in headphones..still does the same thing?....any suggestions would be fantastic!