Help! I broke my original DS! How can I fix it?

So I decided that I should replace the scratched touch screen on my original DS, so I took it apart following steps I found on Youtube. I put it back together, and the bottom screen was completely blank (but the light came one). So I took it apart again, and put it back together, and same thing.

So then I decided to put the old screen back in, but when I tried booting it up this time, the bottom screen flickers for a second and then the DS shuts off.

Any tips, tricks, or help? I am really kinda bummed that I decided to mess with it.