I keep getting "An error has occurred. Hold down the POWER Button to...." each time the updater finishes downgrading and reboots, have to get into recovery to return it to 10.3
I'm using an O3DS U trying to install 9.2.0-20U-O3DS, I've tried downgrading with ironhax and menuhax with the same...
I got the "An error has occurred..." after getting a success in sysUpdate and rebooting and nothing else.
If that's your case, you have to get into Recovery Mode (L+R+A+D pad UP while power on) and download the update when when prompted.
If the update dies middle way, try again but turn off...
I've been playing fallout4 all day, I went into a elevator and it kept going, never stopped, waited 5 minutes, must of been a bug. How bout you, whatcha do today?