Try another cable, to eliminate possibility of a faulty cable. It's possible that you have a break in the cable but regained continuity when you moved it to the other source.
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990/Oppo BDP-83SE/Toshiba A3/Emotiva XPA-3/B&K ST-1430-II/Gallo Ref 3.1/Gallo Reference AV-Center/Gallo A'DIVAti(3)Rear/ MIT Term 2&4 Cable/Mitsubishi WD65C9//Monster HTS-1000.