I can not get my audio speaker to work on my computer and need to listen to the instructional CD for the recovery of my surgery. My eye surgery is Tuesday morning. I can not read the instructions in the pamplet as the print is too small. When I plugged the jack in the tower I heard a sound for a second before the speaker went dead. I had the power plugged into the power strip when I plugged the jack into the tower into a different hole. The 1st hole did not give me any sound. I wonder if I blew the speakers by doing that. I've shut down the computer and tried again. I know i have the right hole in the tower because I had sound for a second. I do not have it on mute. The light on the speaker is on but no sound at all is coming from speaker.