A:AnswerHello, it would seem there may be an issue with a sensor. Let's see if we can get that taken care of for you. Please give us a call when you are with the unit at 1-800-243-0000. ^AC
A:AnswerThank you for reaching out. For best assistance with your inquiry, we recommend reaching out to Best Buy directly. Their phone number is 1-888-BEST BUY (1-888-237-8289). ^CP
A:AnswerIt can be mounted flush with the upper cabinet. There are three venting options and it's easy set it to what you prefer. Mine came top vented, and I switched it to rear vented. You just need to remove a few screws and change the blower orientation and screw it back in place. The third option is to set it to vent thru vents on the top front.
A:AnswerI purchased the same LG Microwave from Best Buy, recently, and was concerned about that, as well. Actually, the light IS on, inside the microwave, when cooking; however, there is a wide black "band" around the front glass door, which prevents the user from seeing the light. Other than that "flaw", I love the microwave!