I have a problem with my bosch radio, it has a gfci outlet on it and that works but nothing else. I took it apart to solder the speaker wires and put it back together and noting works know. I replaced the fuse and still nothing the display lights up but no radio or anything it just makes a loud squeeling noise while plugged in and it also doesnt turn on or off with the switch any help would be appericated or where to go from her . I don't want to put much money in to it if any. Please help.