Sharp Membrane Keypad Failure

Microwave keypad buttons do not respond or respond intermittently.

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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 contacts, Moisture intrusion behind keypad, Damaged ribbon cable, Control board keypad interface fault

How to Fix / Troubleshooting

Safety: Unplug the microwave before removing the control panel.

Steps:

  • 1. Drying: If the keypad was recently cleaned with liquid, allow it to dry for several hours. Do not spray cleaner directly on the panel.
  • 2. Test all keys: Note which keys fail. If entire rows or columns fail, the ribbon cable or keypad matrix is likely damaged.

Advanced: Remove the control panel, reseat the keypad ribbon cable, and if still faulty, replace the membrane keypad or full control panel assembly with the correct Sharp part.

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Repair Difficulty

Medium 3/5

Required Part

Membrane Keypad
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