LG Keypad or Touch Panel Failure

Control panel buttons are unresponsive or respond intermittently; display is on.

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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

Worn membrane keypad, Moisture ingress behind control panel, Loose keypad ribbon connector, Faulty main PCB key-scan circuit

How to Fix / Troubleshooting

Safety: Unplug the microwave before touching the control panel internals.

Steps:

  • Check for child lock: Ensure LOC or a lock icon is not displayed; disable child lock if active.
  • Clean panel: Wipe the keypad with a soft, dry cloth. Avoid excessive moisture.
  • Test all keys: Note which keys fail; if entire rows or columns are dead, the ribbon or keypad is likely at fault.
  • Reseat ribbon (if accessible): Remove the top grille and control panel mounting screw, tilt the panel out (with power unplugged), and reseat the keypad ribbon cable.

If keys remain unresponsive, the keypad or control panel assembly must be replaced by a technician.

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Repair Difficulty

Medium 3/5

Required Part

Control Panel Assembly
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