Quote Originally Posted by tsteever View Post
Even when the bed cycles on and off? I have a fan on the board, some LED strip lights, a print fan, and the extruded fan. When my 12" bed kicks on the lights flicker and the voltage drops significantly. Bad power supply?
Yes even with the bed heater on. What is the amperage of your power supply? If it is adequate I would say you either have a bad power supply, too small gauge DC power wires or poor connections or a combination of things.