Hi,
I recently had some work done on my car and now when I turn the car on and listen to the radio, every 3 minutes it asks to enter the radio code! It never had this problem before. The batter is 100% and the battery connections are nice and tight. I'm not sure if I need a new fuse or maybe the radio is just bad now but it worked fine before I had the work done on the car. (they disconnected battery when they fixed a blown head gasket)

Any solutions would be a great help.