Well, my story looks like far from over. About a week ago Home button stopped working, I've tried to reboot and got the black screen. With a lot of help here we've figured out that emuNAND was to to blame, corrupt or whatever. I've started over, formatted microSD to FAT32 and installed new emuMMC partition on it. Updated fw to 14.1.0, started copying via DBI, and after 3 games put on microSD I got write errors from DBI, then after restart - yellow panic 010041544D530000 error message from Atmosphere. Tried to eject the SD and figure out if I can check it for errors or format it - turned out Switch has made the card read-only, I can't format it on Wndows or a Mac, only errors. Does it mean the card is dead and if anything can be done at this point? It's Samsung EVO, bought via Samsung website, fake proof and considered reliable. Second week in despair.