This should have a DCC decoder. Have you tried to reset? If instructions didn't come with it, you might need to at least remove the tender body (not sure if that's where the decoder is), and find out the brand of the decoder. You could then try to Google for instructions. If that doesn't work, it is possible the decoder is burned out. Was this fresh out of the box, or have you had it for a while? Did the locomotive and/or tender derail causing a short circuit that might have burned out the decoder?