I have a Craftsman 1/2 hp garage door opener. At first the remotes worked just fine but now I can't get them to work at all. I've gone thru the programming set up and I know the main unit is recieving the signal because the small indicator light blinks when I press one of the openers and also when I tried to reset the code from the transmitters to the reciever. The antennae is fully extended and there are no obsticles in the sensor path. Any suggestions?
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