Microwave Buttons Not Responding

• Control lock turned on — Many models have a child or control lock, set by holding a key for a few seconds or pressing a short key sequence, and while it is on the keypad ignores normal presses.
• Worn membrane keypad — A membrane touchpad is a thin layered switch, and once its contacts wear or crack, the busiest keys, such as Start, can quit before the rest.
• Loose or corroded ribbon connection — The keypad's flat ribbon tail plugs into the control board, and a connector that has worked loose or corroded drops some or all of the keys.
• Moisture or grease under the panel — Steam rising from a cooktop below an over-the-range model, or cleaning spray aimed at the panel, can seep under the keypad and cause dead keys or phantom presses.
• Control board fault — A failed board, sometimes after a power surge, can leave the display lit while ignoring every key, or freeze the display.
• Power glitch — A brief outage or surge can leave the control confused, and cutting power for a minute can clear it.

• Some keys work and others do nothing — Worn spots in the membrane keypad or a partly loose ribbon connection.
• The display is lit but no key responds — The control lock, the keypad connection or the control board.
• It beeps, starts or changes settings on its own — A shorted keypad or moisture under the panel, so unplug it or switch off its breaker until it is checked.
• Keys work only when pressed very hard — A worn membrane keypad.
• A lock word or icon on the panel — The child lock has been set, and the use and care manual explains how to unlock it.

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