For an unknown reason, a small crack appeared in the bottom right corner on my macbook screen. At first colorful lines started showing up but eventually turned into a black band two inches high across the bottom and on the left side a vertical band cutting off an inch reducing my screen from a 13" to a 10.5". I chose to replace the lid assembly after research because it was the simplest, least risky, and most cost effective, even including purchasing the ifixit toolkit. And now I have the tools to fix more stuff.
This guide was very easy to follow forward through disassembly and back through the assembly. Thank you for additional notes for assembly. The pictures and directions made this very easy to execute and prevent causing more damage.