Show 1:01 observed after 3-6 seconds, re-operate the phenomenon above. This phenomenon may be the magnetron operating temperature is too high, causing thermal relay or thermal protector to protect itself problematic; may be poor power supply. After the first line with the principle of hard and easy, first check the power supply, the power supply outlet is hot, the contact resistance of the failure is caused by too much connector heat deformation caused by momentary power failure. Replacing a load current of 8A power outlet after troubleshooting.LNRservice manual download site