With all due respect eddiecoid, you're piggybacking a Grande Punto thread that's almost 18-years-old! In addition you've provided very little information other than your radio doesn't work.
Start by going through the Electrical Gremlins and Earthing guides. If you find nothing there that helps then create a NEW thread in the PUNTO section. When you do, provide as much detail as possible. Describe the nature and history of the problem, the model of radio (i.e. original Fiat or aftermarket), what you were doing when the problem started (e.g. installing a replacement radio), what steps you've already taken to try to resolve the issue, any error codes that diagnostics is showing, etc.
You're more likely to get help this way.