I have a BC 72 XLT that I have owned for several years. One day, out of the blue, the audio quit working. The scanning and all features work fine as far as I can tell, but when the scanner stops on an active frequency, very very little, to no audio is heard. I can use ear buds/head phones with the volume as high as it will go, and if I'm in a very quiet environment, I can barely hear the audio. Any ideas on a "do-it-yourself" repair?