I have a Bosch microwave that is 4 years old .The microwave stopped heating .I had a service person tell methe magnetron was bad,but never got back to me with a price i took the magnetron to another person and he told me the magnetron was ok he had I ohm across the terminal and there was no short from either terminal to the chassi.He suggested that the diaode was bad I replaced the diaode and have the same results.Could the magnetron still be bad with thoes readings and if so what else could be the problem ?Could the cap be bad i get a charge when I put power to it and short the terminals Every thing works on the microwave except no heat.The magnetron part number is 2M248J(GS).what does the GS represent.