Garage door opener makes a clicking sound when activated by the remote or wall unit and the lighton the back of the opener flashes. craftsman.

Sounds like the receiver portion of your logic board has quit. The wall control is hardwired and doesn't use the receiver.

There may be an electronic short in either the wall control button or the receiver logic board. In this case, remove the wall control wires from terminals 1 and 2 on the motor unit. Should the symptoms persist after the wires are removed, replace the receiver logic board. If the symptoms stop with the wall control wires removed from the motor unit, replace the wall control button or the wires leading to the wall control button.

Make sure none of the staples have cut through the wires leading to the wall control.

The unit is flashing the code for 'motor overheated or RPM sensor failure'. If the door is stuck in the open position it could be because the trolley is jammed against the bolt just in front of the motor unit. Remove the bolt and run the opener until the door is closed. Now on the side of the motor unit you will find the 'up limit' adjustment. Turn this 2 full turns in the opposite direction of the arrow printed on the cover. Be sure to replace the bolt.

TRY RESETTING THE UNIT BY UNPLUGGING IT FOR ABOUT 5 MIN.

IF WHEN YOU PLUG IT IN THE REMOTES STILL DON'T WORK TRY TO REPROGRAM THEM.
IF STILL HAVING TROUBLE--
COUNT THE FLASHES - GOTO LIFTMASTER.COM DOWNLOAD A FREE PDF FOR A SIMILAR UNIT (THE MODEL NUMBERS ARE DIFFERENT BUT THE CODES ARE THE SAME).
HOPE THIS HELPS

where is door trolley, up or down. did it go up too far and wedge against bolt in track. take out bolt to release and try. put bolt back in. did you overheat motor. wait 15 minutes. give more info. (Does light bulb blink 10 times, then safety beam problem affecting door going down).

a component in the wall unit is failing , that makes the conection happen when the remote signal is recieved , ( it is recieving the remote signal but not sending it out to the control circuit for the motor )

The unit is in the lock mode, push and hold the lock button in for about two seconds and the green LED should stop flashing. Your remotes should work.

Make sure the code set inside the remote is the same as in the main reciving unit code.

CHECK TO SEE IF THE LED ON THE WALL CONTROL IS FLASHING.

IF IT IS THE LOCK / VACATION SWITCH HAS BEEN ACTIVATED. THIS IS USSUALLY A SMALLER BUTTON ON THE WALL CONTROL OR A SMALL SWITCH ON THE WALL CONTROL.

WHEN THIS HAS BEEN SET TO UNLOCK THE UNIT, ALL OF YOUR REMOTE FUNTIONS SHOULD WORK.