Why? Not sure how updating from 2.1 would not brick his system on N3DS when it's known to be a guaranteed brick, so I somehow doubt he even did that while on 2.1 but instead at some other part. If his console works and if he can boot into D9 to restore a backup, then doing that would do
exactly the same thing that a hardmod would.
@B451CW11M0DD3R
What guide did you use? What part did you get black screens on? What FW are you on
right now? Just because it's like that right now is irrelevant, because judging from your picture the console actually works. If it works, you should be able to start over. If you can get back to 2.1 and install A9LH, then restore your backup that weird problem should disappear as well. Keyword is:
should