I moved into this house and have had nothing but problems with my Craftsman 1/2 hp Opener model # 139.53636SRT. Initially it was the sensor issue where you hit the button and it clicked and lights flashed, but once I had the sensors aligned that problem was fixed. this may be totally unrelated, but I noticed the problem on this when I put the second lightbulb in the opener. When I hit the open button now, the light comes on, it dims a little and you hear a buzz for as long as you hold the button down. I have seen a lot of people ask this question, but no real good answers, well, not even any answers. Can someone please help? Can you email me back this reply also? Thanks.