Garage Door Not Opening With Remote Control or Mounted Button?The above description generally describes the problem I am having with my garage door opener. However, I realized that if I unplug the opener power cord and replug it to the power outlet in the ceiling, the opener would respond again. But it would fail again later on, i.e a few days later. Any clue for the real issue? If indeed it is the circuit board at fault, how do I replace or trouble shoot the circuit board? I don't have owner's manual, but I believe it is Sears.