I have a logitech z506 5.1 speaker setup and the only speaker that doesn't work is the sub. I've tried the test in windows and realtek audio control panel. Any Help?
Could be a bad cable, broken sub amplifier or blown speaker. Try another cable. Connect another speaker to the sub out of the PC and see if you get any sound when you test.
Could be a bad cable, broken sub amplifier or blown speaker. Try another cable. Connect another speaker to the sub out of the PC and see if you get any sound when you test.