Short story, the machine only show black screen. Has Luma, tried holding A before power on, no luck. Same while holding start(hourglass) or down(D9WIP). Any more thing I can try before doing a hard mod? Long story, was on 9.2, used D9WIP to dump ticket.db from sysNAND, used FBI on sysNAND to copy the whole title folder. Ran ctrnand-title-cia-gen as suggested by D9WIP to gen all system installed cias. Kept them as 9.2 cias for downgrading use. Upped sysNAND to 11.2, then installed back all those 9.2 cias, thought that can downgrade back to 9.2. Now machine just shows black screen... I felt dumb but wasn't that how you downgrade?