I tried to downgrade to 9.2.0 and i had a problem. I checked the cia files with the SafeSysUpdate. Then, i open Sysupdate, and started downgrading. But then, appeared a screen saying "failed to get to files". And then, the screen turned black. Now, i try to turn it on, but the screen keep black. What can i do? I was on "9.5.0-23u"