Just installed a pair of Eris E3.5 monitors with a new turntable. Yesterday, everything worked great. Today, the left monitor produces no music, but produces lots of distortion noise when the music increases in volume. The right monitor sounds perfectly fine. I tried listening with headphones, using the headphone jack on the front of the left speaker. Similar to what the monitors did, the headphones only played music through the right side, and either nothing or noise through the left. I've checked and double-checked all connections, e.g., to verify none are reversed and grounding is OK. I can't see anything out of the ordinary with the stylus. I've checked the turntable to ensure it is level.