Why is my bottom screen discolored?

I recently repaired my top screen an speaker cable an digitalizar because when I turned on DS bottom screen would just flicker an pop then turn off.so I opened it up an those ribbons looked bent so I replaced them an now it turns on an works an the top screen looks fine but the bottom screen is discolored.so does that mean that I need to replace bottom screen? Or could it be something eles? An also when I put a original ds game in an play it an its shows the black screens real fast because its loading but instead of black it shows green on both screens.(“haven't tried a 3ds game cuz i don't own one”)