Product review (5 stars): A Virtue of the Internet
My six-year-old GE over-the-range microwave mysteriously  died one morning. I found the model number and downloaded the manual online and tried a couple of the troubleshooting tips but nothing worked. Was about to spend $500 on new one when, on a hunch, I did a search of the model number to see if it might have a fuse. The official manual, strangely, was silent on this fact. Bingo! I found a link that not only gave me the fuse model number but included a diagram of how to get to it. (It was little tricky, involving removal of the vent grill and two other small parts.) Then, how to track down the fuse? I found two online, one from a company that wanted $5 plus $16 shipping -- yes $16! --  for one measly fuse. Then I saw I could get it for about $5 as an add-on order on Amazon. That was a no-brainer. It arrived, I popped it in and the microwave came back to life, saving me $495. Yes!