I have a Craftsman garage door opener that will start to open or close then loses power and stops even the lights are off and the led on the wall control is also out. it will remain in the off condition for maybe 10 seconds or so and then the wall panel led and the unit lights will come back on. Sometimes then it will work and other times will go off again repeatedly while trying to get it to close or open. The power to the unit is stable. Is this a circuit board problem??