Newbie with a problem before even getting started. Just bought a cobra beach magnet off cregslist,was semi working when i checked it out as soon as i got home tryed to use it in backyard had no sound, found coil or coil wire has open connection at coil,if you can hold the wire just right and push in you can get a sound. Just got off the phone with kelleco and they said coil could not be replaced,wanted to sell me a new one. any help would be greatly appreciated