SE
LG
Keypad Short (Stuck Key Error)
Microwave beeps repeatedly and displays SE; keypad may act as if buttons are being pressed by themselves.
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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
Moisture inside keypad, Damaged or worn membrane keypad, Contaminated keypad ribbon connector, Faulty control board key-scan circuit
How to Fix / Troubleshooting
Safety: Unplug the microwave before cleaning or inspection.
Steps:
- Clean and dry keypad: Wipe the keypad with a soft, dry cloth. If there are sticky residues, use a slightly damp cloth with mild soap, then dry thoroughly. Do not spray cleaner directly on the panel.
- Allow to dry: If SE appeared after heavy steam cooking, leave the door open and let the unit air out for several hours with power disconnected.
- Reseat keypad ribbon (if accessible from front): Remove the top grille and control panel mounting screw, tilt the panel out (with power unplugged), and carefully unplug/replug the keypad ribbon cable.
If SE returns, the keypad membrane or control panel assembly must be replaced. Because this involves disassembly near live circuits, have a technician perform the repair.
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Repair Difficulty
Hard
4/5
Required Part
Control Panel Assembly (Keypad)
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