subject basically says it all.....I have one speaker when plugged in, I get no green light, no sub sound.

What should the steps be to diagnose? Look at the fuse....?

Thanks.

Sorry to hear you're having an issue with one of your Tritons. Yes, check the fuse, also check to make sure A/C cord is tightly in place in socket, and check to make sure the outlet that it is plugged into is live.

If all that checks out and still no light, contact your selling dealer for service and support.