I moved our computer into a different room and now the speakers don't work. They are plugged into the outlet and then into the computer in the hole that's labled "SPK", which I assumed is for speaker. I've tried every other place the thing would fit, but they still won't play.
Stupid question but is the computer muted? Look for a little speaker with a red circle with a slash through it. If you don't see a speaker at all go to Start>Programs>Accessories>Entertainment>Volume Control and check there.
Also make sure the speakers are plugged into the green hole. I know you said you looked but it is a common mistake to plug it in the wrong hole when reading the labels.