Hi @hikarugunner ,
Here’s just one link to the [https://www.mobilerdx.com/2020/03/download-redmi-4x-service-manual-schematics-diagram.html|schematics] that may help. There are others but with some they want credit card or you have to join the website to download.
I haven’t downloaded this one to view it In any event as always when downloading files check them with a virus checker ''before'' opening.