Not so long ago, my rear left speaker seased to work properly. When I turn it on, it hisses, and then hissing stops and there is no sound. I did run internal speaker test, like the one without a PC, and it confirmed that the speaker is not working. About three weeks ago, the speaker began to work for a while, then stopped again. I have it plugged in to my Creative LS sound card, digital output. I also, have my other old PC plugged in to Analog. So when I am using my older PC, I just press the "analog", button.
Question: What may be a problem and how do I fix it? Thanks.