Midea's microwave oven M3-L233B uses a magnetron model of 2M2 14-240GP, which is commonly used in microwave ovens.

If you need to replace the magnetron, it is recommended that you buy the same type of magnetron, or consult the manufacturer or maintenance center for the applicable magnetron model.

Please note that replacing the magnetron requires professional operation. If you are not familiar with the maintenance of microwave ovens or electrical appliances, I suggest you seek professional maintenance services.