SOLD OUT: NO LONGER MADE BY CHINA. Heat Surge W-5 Power Supply Board (PSB) controls all the functions of your Roll & Glow Fireplace. Common failure is the micro switch that controls the light bulbs. Wrong bulb size is often the cause for this failure. Other reasons for board burnout can be from stray voltage, power surge, or lightning strikes. Each wire has it's own post on this board. Shop time 1 hour. 11.12.24