Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC
If you have a newer model 2000 and after you need to replace the logic board (receiver is bad)
if your opener is older the receiver will be located at the back of the motor, wired with 3 wires to the top, remove this and replace
then reprogram remotes
Posted on Oct 08, 2010
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Posted on Jan 02, 2017
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FIRST CHECK TO SEE IF THE LOCK/VACATION BUTTON ON THE WALL CONTROL HAS BEEN ACTIVATED. THE LED ON THE WALL CONTROL WILL BE FLASHING. - SIMPLE SOLUTION PUSH THE LOCK BUTTON AND HOLD FOR 2 SECONDS TO TURN OFF LOCK FUNCTION.
SECOND TRY TO REPROGRAM THE REMOTES TO THE UNIT - THEY WILL SOMETIMES LOSE MEMORY IN AN ELECTRICAL STORM.
IF REPROGRAMMING DOESN
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