Won't turn on... Sd slot broken... And can't buy the parts... Credit card...What exactly broke? If you have a working bottom screen you can just do a system transfer (but make sure to backup saves from any CIAs you've installed and redownload all homebrew CIAs you've installed as they don't transfer).
Do you need to back up movable.sed to convert 3ds into CIA? I tried to convert it once, and if I need to, then I backed it up.The only thing I can think of is taking the movable.sed from the old system and injecting it into the new one to just use the same SD card, but that would only work if you've already backed it up.
No, the movable.sed encrypts the SD card's contents. Converting a .3ds into a .cia wouldn't need console-specific info, it would probably just need some encryption keys (which every console has).Do you need to back up movable.sed to convert 3ds into CIA?