If the microwave display lights up but buttons do nothing, look for a Lock or LOC indicator first. Control Lock can intentionally disable the keypad. Follow the model’s unlock sequence, confirm the door closes normally, and wipe only the dry exterior control surface. If one button remains dead, the keypad reacts unpredictably, or the microwave starts without a valid command, stop using it and arrange professional service. Never remove the outer cover to test a touchpad.
All buttons beep but do nothing. Likely cause: Control Lock or an invalid-entry state. Homeowner action: Look for Lock or LOC and follow the model manual.
Only Start does not work. Likely cause: Door closure, Start pad, or control problem. Homeowner action: Check for an obstruction at the door; do not bypass the latch.
One row of keys is dead. Likely cause: Keypad membrane or control interface fault. Homeowner action: Record the affected buttons for service.
Panel works only after pressing hard. Likely cause: Worn touchpad or intermittent connection. Homeowner action: Stop forceful pressing and schedule diagnosis.
Display is dark too. Likely cause: Outlet, breaker, fuse, or internal power issue. Homeowner action: Check safe exterior power conditions once.
Microwave runs by itself or ignores Stop. Likely cause: Control or switch fault. Homeowner action: Disconnect power safely and stop use immediately.
DIY difficulty: Low for lock, door, display, and exterior cleaning checks. Time: 15-25 minutes. Tools: Model manual, soft cloth, microwave-safe cup. Safety risk: High for any internal access or damaged door. Call a professional: Repeated dead keys, damaged latch, unexplained starts, or a panel that ignores Stop.