I have another electronics question for y'all, I found an old Sony mini cassette player/recorder, it seems to turn fine without a tape in it, but when there is a tape it will stop or not turn at all. While it turns it makes a high pitched squealing noise, weather the tape is in it or not. I have taken the back cover off, but decided to get some help before I completely disassemble it. I can get pictures if it helps. Thanks!