I wonder if I can do a system transfer with this method, although using the buit-in app instead of calling Nintendo? I mean, considering there's no Nintendo support where I live.
I have a similar problem. The ribbon cable of the top screen is broken. I tried to turn on the DS. The green led lights, the bottom screen flashes and then the console turns off. Installing a new top screen (to replace the cable) should solve this?
Are you sure you patched the right file (the one with the "e" at the end of the filename)? I've got that black screen using the rom without the enlarger, just applying the patch.
Try using the R4 Rom trimmer (v. 2.0) before using the enlarger