Microwave making noises

I got this microwave in 2003 or 2004. It has performed well after 10+ years of use. The light bulb has gone out and the oven makes a strange squeal and buzz sound when it starts now. I think it is on it's way out. As cheap as microwaves are to buy and the fact it is about 11 years old, it is about time for a new one. I liked the fact it doesn't have a black window and that the control buttons are built into the door keeping the width to a minimum. I wanted another one built that way but haven't been able to find any. Counter space is limited, so I may have to buy a smaller size oven to fit the same space due to the fact right hand control panel adds an additional 3 + inches of width.