Chamberlain
Logic Board Power Supply Failure
Garage door will not open at all; opener does not run, no motor sound, but outlet has power.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Blown internal fuse, Failed low-voltage power supply on logic board, Burned transformer, Surge damage
How to Fix / Troubleshooting
Safety first: Unplug the opener before opening the housing. Capacitors can retain charge; avoid touching exposed terminals.
Steps to fix:
- Verify outlet power: Plug a lamp into the same outlet to confirm it is live and not controlled by a wall switch.
- Inspect opener power cord: Check for cuts, kinks, or damage. Replace if compromised.
- Open housing: Remove the light lens and cover. Look for an internal fuse on the logic board. Replace only with the same type and rating if blown.
- Check for board damage: Look for burnt components or discoloration. If present, replace the entire logic board.
- Reassemble and test: After replacing the board or fuse, restore power and test operation.
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Repair Difficulty
Hard
4/5
Required Part
Logic Board Power Supply
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