Microwave display shows H0 or HO; unit may not respond to input or may be in demo/child lock mode.

Safety: No internal repair is usually needed for this condition.

Step-by-step checks:

• 1. Check user manual: Refer to your Midea microwave manual for the specific child lock or demo mode instructions. Codes like H0/HO often indicate a lock status, not a fault.
• 2. Disable child lock: Common methods include pressing and holding the STOP/CANCEL or LOCK key for 3–5 seconds until the lock indicator disappears. On some models, pressing 0 for several seconds toggles the lock.
• 3. Exit demo mode: If the microwave runs without heating and shows a special code, it may be in demo mode. Typically, you press and hold a combination such as STOP/CANCEL and START or a specific function key for several seconds to exit. Follow the manual for your exact model.
• 4. Power reset: Unplug the unit for 2–3 minutes, then plug back in. This can clear a stuck logic state.
• 5. Check for stuck keys: If the lock reactivates by itself, a keypad button may be stuck. Gently press each key to ensure it moves freely. If keys feel stuck or unresponsive, the keypad membrane may need replacement.