When you say you have several bulbs out that makes me wonder if something other than a burned out bulb might be wrong. One bulb going out I can understand, bet several seems unusual. Are other parts of the fireplace still working such as the heater and fan? We have a 2007 Big Horn 3055RL and our whole fireplace quit on us about two years ago. It turned out to be a loose connection in a small electrical junction box outside and beneath our fireplace slide.