This Replacement is not very difficult and can be done at home.
You will have to pry off the glass cover lid. There are no screws that you have to worry about. Just insert a spudger into the crack between the glass lid and black base as shown.
After lifting the glass cover up, the light assembly will come free because it was only held in place by the glass top.
Now that the scanner light assembly is free. Lift it out of the scanner bed and unplug the large white wire that attaches it to the rest of the printer.