The display on a Sears Kenmore Microwave Oven from the Cambridge Massachusetts store didn't display during heating. The door on the another Kenmore Microwave Oven jiggled. Sears offered another Kenmore Microwave Oven, a different model, that had a dent. Sears sent another Kenmore Microwave Oven then picked it up. It had a loose part inside the base and when turned on it didn't heat. Sears handled each exchange as routine. To be continued!...