Folks, Here's the deal. Samsung over the range microwave Model # SMH9207ST. Oven started beeping when not in use and SE code displayed on control panel. Unplugged to reset and it worked for about 3 min. before it beeped 3 times and went to SE code again. The oven is completely inoperative. Oven is just shy of 3 years old. What does the SE code indicate? Is it something that I can fix or replace myself? If so, what part do I need to order and how much should I expect to pay for it? I just spoke to a Tech whom I could not understand and he quoted a price of $150.00 parts and labor? Any help is greatly appreciated. Thanks Chuck