I have a 2006 Volvo c70 and the radio dose not power up I press the button and the icon comes with premium sound and goes away but if I pull the subwoofer fuse and put it back in it works and then when I start the car it goes away and then I can pull the fuse and it will work till I start the car again.

I need help I don't know what to do.

 

does your model have a power antenna? I'd suspect you have a ground wire or connector issue