I have a Sony Hi-8mm video camera. The cassette chamber is the type that moves up and then moves out for inserting a cassette. without a cassette the mechanism will open and close no problem, however, with a tape it will close but not open. I am looking for troubleshooting hints as well as a list of parts for the camcorder. Any information you can provide will be extremely appreciated. Thanks in advance, Andrew By the way I could simulate the situation by covering the bi directional LED with a piece of video cassette tape. Theory being that the LED should penetrate the tape to see the sensor. Am I totally off base. Please help.