I just discovered this same problem. We had a very brief power blink, but when everything came back on, my Klipsch ProMedia 2.1 BT speakers will no longer work through the aux. I've unplugged them, factory reset them, rebooted the computer, and the blue light just keeps blinking a slow blink with no sound coming through the speakers. I really wish I had a better answer, but I came here to find one. You are not the only person with this issue.