Have been meaning to replace a burned out bulb for the last year. GE evidently designed the old Profile to be inpenetrable by the average person. Took me a while to get inside and find the light. Then, due to the age of the machine, could not find the bulb. After a short and lucky internet search, found AppliancePartsPros.com where I found instructions (that confirmed what I had done to get in the machine) and the light bulb that arrived 3 days after ordering it. Now, we have a lighted microwave. Thanks, so much AppliancePartsPros.com. Definitely in my bookmarks now.