Hi My fireplace works, background lights up and heater blows heat but the flames stopped looking like they were moving and now just a blank light . What could this be A fuse ? If so I can not find a manual online to explain where to find the fuses and if I take the back off will I be able to get it back together again. The Fireplace Model is FL 28-R The part is FJ20-1 2308v 120v-60hz 20 w class A Thanks for your assistance