Found microwave oven unit off. Removed cover and inspected unit. Found middle 12amp fuse blown. Replaced fuse and started unit. Put unit into test mode and checked mag circuit, at 17 amps. Spoke with Louis at turbo chef and said issue may be due to shorted wire or power surge. Checked for bad wiring and found none. Let unit heat to temp and ran for 30 minutes with no issues. Unit okay at this time.