I have a Sears garage dood opener that is very hard to operate with my remote, I have to move all over searching for a spot where it will work, finslly I will find a location and thing will work. There is nothing else on the garage door electrical circuit, and I have tried unplugging all large electrical appliances to see if one was causing interfence, no help. I have been told I should replace the logic board, however door woks perfectly when manual pad is used. Is there anything else I can do to fix this problem? I have replaced the battery in remotes and tried repositioning the antenna a bit.