Hi!
The best thing to do is to follow the guides.
It's hard to explain..
Hopefully one of those guides can help you: [link|https://www.youtube.com/watch?v=Jp07N_FjA1k|The IMPOSSIBLE Nintendo 2DS XL Repair!|new_window=true]
Another guide: [link|https://www.youtube.com/watch?v=edZq9r2WosU|Nintendo 2DS XL Teardown - Full, Detailed Disassembly Guide|new_window=true]
If you need anything else, please let us know.