The left side of the my outdoor speakers do not work when the speaker selector box is in a horizontal position. It works when I have the selector pulled out and down to check the connections but when I slide it back in place the speaker does not work. I changed out the wire to the left speaker yesterday and that did not resolve the issue. I also moved the speaker wires to an unused set of terminals and that did not resolve the issue. Acts the same. Installed new pin connectors and that did not resolve the issue. Talked to selector box tech support and they could not see a reason for the box failing.