It is a Craftsman 1/2hp chain drive garage door opener, model 139.53985, serial 14541100085.
I assume you changed codes in your remotes. When you do this you need to erase all the codes in the logic board's memory. To erase the codes, hold the learn button in until the led goes off.
After erasing the codes you must reprogram all remotes and the keyless entry if you have one. To program the remotes, hold the button on the remote you want to operate the door in, press and release the learn button and release the button on the remote. To program the keyless entry press and release the learn button on back of the motor unit and within 30 seconds enter the 4 digit code on the keyless touchpad. Hold the enter button in until the light on the opener flashes.Member
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