This DIY repair guide explains how to replace the logic board in a garage door opener. The logic board is the "brains" of the garage door opener. It contains the radio frequency (RF) receiver for the remote controls and other control components. Because other problems share the same symptoms, a service technician should confirm the logic board is the problem, or you can try our troubleshooting videos Garage Door Opener Wall Control Troubleshooting Video and Garage Door Opener Remotes Won't Work Video. If the logic board no longer works, replace it with the manufacturer-approved replacement part.
Use these basic steps to replace the logic board in Craftsman, LiftMaster and Chamberlain garage door openers.
This video explains how to replace the logic board on a garage door opener.
Use a step ladder to access the garage door opener’s power cord and motor unit. Unplug the garage door opener.
Unplug the garage door opener.
Take the garage door opener down
Position a work table near the area under your motor unit to hold the garage door opener during the repair.
Pull the emergency release rope to release the trolley from the garage door.
Shut the garage door if it's not already closed.
Remove the fastener ring from the straight door arm connected to the outer trolley.
Pull out the clevis pin while supporting the straight arm to disconnect the garage door from the outer trolley. Use a helper if necessary.
Lower the straight and curved arms down and rest them against the garage door.
Open the light cover to access the wall control and safety sensor wires connected to the motor unit.
Take a digital photo of the wall control and safety sensor wires connected to the motor unit. You'll refer to the photo later when reconnecting the wires.
Disconnect the wall control and safety sensor wires from the motor unit.
Close the light cover.
Remove the nuts, bolts, and lock washers that secure the motor unit to the ceiling bracket. Support the motor unit with one hand as you remove the last bolt from the ceiling bracket.
Carefully lower the motor unit down and rest it securely on top of the step ladder.
Climb down the step ladder, lower the motor unit down and rest it on your work table.
Move your step ladder by the garage door so you can remove the rail from the header bracket.
Remove the fastener ring from the header bracket clevis pin.
Pull the clevis pin out of the rail and header bracket while supporting the rail with one hand.
Lower the rail and rest it on a rung of the step ladder so the rail is level with the motor unit on your work table.Tip: To avoid scratching a decorative garage door, remove the nuts, bolts and washers from the curved arm and carefully rest the curved arm against the door when disconnecting the garage door from the outer trolley.
Disconnect the door arm from the trolley.
Remove the logic board
Remove the light cover and light bulb from the control panel.
Remove the screws from the control panel and pull it out slightly to access the wire connections.
Disconnect the wires from the logic board.
Remove the logic board mounting screws.
Pull the logic board off the control panel.
Release the control panel.
Install the new logic board
Thread the antenna wire through the control panel hole.
Position the new logic board on the control panel.
Install the mounting screws in the new logic board.
Push the antenna wire through the hole on the corner of the control panel.
Connect the wires to the new logic board.
Reinstall the control panel on the motor unit and secure it with the mounting screws.
Reinstall the light bulb and light cover.
Install the new logic board.
Reinstall the garage door opener
Reconnect the rail end to the header bracket using the clevis pin and fastener ring.
Position your step ladder under the motor unit ceiling bracket and carefully set the motor unit on top of the step ladder.
Climb the step ladder and reinstall the motor unit to the ceiling bracket using the nuts, bolts and lock washers.
Open the light cover to access the wall control and safety sensor terminals on the motor unit.
Using your digital photo for reference, reconnect the wall control and safety sensor wires to the motor unit.
Close the light cover.
Reconnect the straight door arm to the outer trolley using the clevis pin and fastener ring.
Re-engage the trolley.Tip: Reconnect the curved door arm to the straight door arm using the bolts, lock washers and nut if you disconnected the curved arm from the straight arm when freeing the garage door from the outer trolley.
Reconnect the rail to the header bracket.
Reconnect electrical power
Plug in the garage door opener.
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