Everything seems to work, it's just there's hardly any sound from the radio or the tape deck. Tape deck runs fine, rewinds, fast forwards, etc, it's just that there's no volume. Same with the radio. Stations tune in, but you can barely hear anything. The volume sliders are really staticy so I know they'll need detox cleaning. Any idea what the problem may be? I can try and post a video if that helps. The box is a Hitachi TRK-7100H
Any advice would be great!