Within a month or two of purchasing my T5z, I experienced a popping or crackling sound while I was playing (almost like the battery was dying). I brought it to my dealer who replaced the ground fuse. He told me that I must have been playing through "dirty" electricity. I am experiencing the same issue again. I have a fuse to replace old one, but before I replace and start using it again, I want to make sure I prevent this from happening again. Any suggestions?