garage opener Sears/Craftsman #139.53637srt won't start from wall switch, transmitter or shorting it,what else can I check.
If you short it and the light bulbs flash then it might be the sensors. If not then it is time for a new logic board. These are fairly easy to install, you just have to reprogram the remotes. You can go to searspartsdirect.com, click on the contact us icon for help. have the model # ready. Thanks BB
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