Hi Quilter77. The instructions in the owner's manual for this LG 2.0 cu.ft. Over-the-Range Microwave Oven with EasyClean®, Model # LMV2031ST state that the Energy Saving feature on this unit saves energy by turning the display off after 5 minutes of idleness after Energy Saver button is pressed if the clock has not been set.
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Use only microwave safe containers when cooking and reheating foods Beware – not all food containers should be used in microwave. Posted on December 4, 2013 by Diane Rellinger, Michigan State University Extension