My kid dropped my first generation iPhone and now several parts of the display only show grey. Looks like some pixels died. There are no cracks on the screen and touch works in the areas that are grey.
What should I replace to fix this? I believe the screen is made up of different components (glass, LCD etc). Should I replace the whole display unit or can I just replace the part that is broken?
Which is the cheapest place online to get the replacement part?