I have a Liftmaster HBW077. The opener operates from the wall mounted button. There are two remotes and neither will open the door. The green light on the WALL button is blinking. There is nothing that looks like a Lock Button (suggested to check in the owners manual) on the wall or on the opener. I checked the alignment of the safety beams and they seem fine. I checked the open and close force and they seem to be properly set. If reprograming the remotes does not work, what could the problem be?

Press and hold for 3 seconds the lock button on your wall control. It is the one with a lock icon.

Press and hold the lock button on the wall control for 3 seconds.

Press and hold the button with the lock icon for 3 seconds. This will stop the blinking and your remotes should work.

Press and hold for 3 seconds the button on the wall control with the lock icon.

Hold the button with the lock icon in for 3 seconds. This should toggle the unit off vacation mode and your remotes will work.

this just happened to us today as well. the wall pad has three buttons: one large back-lit button pad to open it and a lock button and a light button. the open button was blinking quickly and would open the door, but the car remotes did not work. I found that by pushing both the "lock" and "light" button at the same time for about 3 or 4 seconds, the back-lit "open" pad stopped blinking and went to steady green. I went back to the cars and checked the remotes there. both opened the door.

hope this helps someone out there

Check the alignment of the safety light beams near the floor on each side of the door. They are not properly aimed and the safety reverse feature will not allow the door to close properly.

Does your wall switch have a lock feature? By pressing the lock button, the remote control is disabled. A flashing light indicates this feature has been activated.

To deactivate, press and hold the lock button for 2 seconds. The flashing should stop and your remote should work again.

Have you tried to reprogram the chanel again?
Changed the battery?

Hi. The green light was flashing and ny transmitter in the car would no longer operate the door. On the back of the liftmaster, just below wker the small wires go in, there is a small, flat, green button. I pressed that with a stick and it solved the problem.