I have a pioneer elite sc 35 receiver and a technics sl 23 turntable,everything has been working great and all of a sudden I have no sound from the left channel. I have checked all of my wiring, I switched the phono input left & right cables, right to left & left to right, and still no left channel sound. The left channel works on the tv & blu ray player. I tried using another input on my receiver but come up with no sound at all. I checked all the settings on my receiver input setting. Can someone help me????