Onkyo TX-28 Receiver Output Problem

Question

I have an unusual problem. I have an Onkyo TX-28 receiver. When I got the unit I connected it up and the right channel put out distorted overdriven audio and the left channel had no audio. I looked inside and the left channel fuse was blown. I replaced the fuse now the right channel has no audio and the left channel puts out the same distorted audio. When I remove the left channel fuse it reverts back to its origial state. Quite a puzzle.Thanks!DJ...