Radio Issues

My radio was having a freakout and kept randomly popping into Safe mode (almost on a daily basis). I know the code deal and was able to keep getting it back and brought it to my mechanic who changed the fuse in an effort to stop the problem. Now, the radio has lost power entirely. It's been out for days, any suggestions? The radio worked for the first day after getting it back, so I know the fuse was installed properly.