I’ve seen this before on equipment before where the light comes on but there’s not enough ampage and the device won’t work properly. If you’ve got another power source, I’d definitely try it–could be that simple.
Sounds like the unit or power supply went bad. 🙁 Have you tried replacing the power supply? I’m probably still going to get one since if I have problems like this I’ll work with support to either get it sorted or get a refund.