Chosen Solution

They have power but they don’t have sound

Ken Hale you are not telling us how they are connected. I am assuming they are on a computer. You do want to make sure that you are not having the mute button on and that your computer does indeed have audio out on. Also, make sure that the volume is up. To test the speakers, I would suggest that you use a different input source. i.e. MP3 player or even your cellphone. See if the speakers work then.