My SM-J701F (Android 7.0) stopped connecting to any PC after a failed root attempt using KingRoot(PC). I have been using the official Samsung cable, and the phone used to connect just fine before i tried Kingroot. Now the phone just charges itself after being connected via USB. I've tried setting USB config as MTP, installing MTP drivers in PC, uninstalling phone drivers from my PC, changing cables, changing PCs themselves- nothing works. Neither the PC nor the phone detects any connection. The phone can't be rooted now, so I can't find a way to restore it to a previous backup either.