Unplugged microwave. Removed the under plate of the microwave by first removing screws, disconnected electrical, laid on flat surface. Removed and replaced glass plates. One light bulb was removed and replaced easily. The second bulb broke off, so, that's why I had to remove the under plate and get the twisted part of the light bulb out with a pair of mini needle nose pliers. If the bulb didn't break, the repair could have been done without removing the plate. Reassembled microwave, and the new lights work great!!