MasterChef Keypad Matrix Failure

Microwave keypad buttons are unresponsive or only some keys work.

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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, Cracked keypad ribbon cable, Moisture ingress behind panel, Failed keypad scan circuit on control board

How to Fix / Troubleshooting

Safety first: Unplug the microwave before working on the control panel.

Steps:

  • 1. Test all keys: Note which keys work and which do not. Patterns (e.g., entire row or column) suggest a matrix issue.
  • 2. Clean surface: Wipe the keypad with a slightly damp cloth. Do not allow liquid to seep around the edges.
  • 3. Power reset: Unplug for 5 minutes and test again.
  • 4. Inspect ribbon cable (experienced DIYers): Remove the control panel and check the keypad ribbon cable for cracks or corrosion. Reseat it on the control board.

Next steps: If multiple keys remain dead, replace the membrane keypad or entire control panel assembly.

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Repair Difficulty

Medium 3/5

Required Part

Membrane Keypad Panel
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