I have a 1/5 HP sears garage opener model: 41a4315-7c It opened this morning and now won't close. When i push the button, the motor clicks twice, light comes on but the door doesn't budge. I've manually released the door and can move it. green light on the back of the unit flashing 5 times. I unplugged the power for a couple minutes and plugged it back in and nothing changed...same problem.