The microwave will not heat food. It will turn on the turntable will go around and the time will count down but the food is not heated when done. tried different heat setting with no results.

This seems to be a common problem, there are three parts that will cause this, the magnetron "heats food" a common failure, the high voltage diode and capacitor are the other two culprits. The cost to repair will approach the price of a new oven.

Many Samsung Microwaves have a demonstartion mode retailers use to demonstrate the unit. It allows the unit to function but not heat. The demonstration mode can be turned on and off by holding the 0 while pressing the 1 to turn the demontation mode off and on. This happened to my mother's SMH9187W over the range during cleaning. It is where I would check first before troubleshooting electrical components.