This is an under the counter microwave. Simply removed the two screws holidng the vent grille on top of the unit, lift out the old charcoal filter, clean the vent fan exit surfaces then replace the filter and put the vent grille back. Be careful to not drop either of the two screws after one is installed as you will have to take the grill off and start the screw installation again unless you have a magnetic to retrieve the dropped screw. An easy five minutes at most to change.
Took the replacement plate out of the box and put it in the microwave in seconds. I never realized how much of a difference having the correct microwave plate would make. It's great to have it back.
You had alerted that it was imperative to unplug unit before starting to remove defective bulb. As described, there was silicon on bulb and socket and bulb broke upon my attempt to remove. Had to use needle nose pliers to get metal base of old bulb from socket, then all went well.
I had no problem installing the new filter. Just used a phillips screw driver to remove the two screws holding the vent cover in place. Cleaned the dust out of the ducts and reinstalled the new filter. The screws must be held to the screw driver with your finger tips so you don't drop them in the vent cover. The most difficulty I had was in clearing the clean code from the screen. There are no instructions in the owners manual for doing this. But after several tries I got it.
The problem I have with changing the bulb is my microwave is an overhead one and therefore I cannot tip it on its side to easily replace the bulb. I have to drop the lid down and carefully install the new bulb from underneath.