Verify that a cooking time was selected using the number pads and "Start" was pressed if the unit does not seem to be working. If there is no power to the microwave, check the fuse or circuit breaker and reset it as necessary.
Unplug the microwave and wait a few minutes before restoring power if the unit has power but does not seem to be working correctly. This will reset the microwave's microcomputer.
Shorten the cooking time if items are too hot or are overcooked when timed cooking is complete. If items are still cold or only partially cooked when the microwave has finished, increase the overall cooking time.
Pause the microwave during cooking and turn or stir items if food is unevenly cooked or cold in the middle when the cooking time has completed. Close the microwave door and press "Start" to resume cooking.
Consult a service professional if the steps described here do not resolve the issue.