Was stuck on black screen after Nintendo logo when I tried to upgrade firmware to 9.0.0 with sx os 2.9 choidujourNX 1.01 so like another post mentioned I booted atmosphere and installed firm 9.0.0 again with choidujourNX 1.02 and it works fine again.
auto
I don't know much so I probly won't...
I was stuck at the Nintendo logo black screen loop after updating my switch sx is 2.9 to firmware 9.0.0 with ChoidojourNX 1.01 fortunately i could still boot into rcm so I booted up atmosphere like the other post said and updated my firmware through choidojourNX 1.02 and it works fine now.
Shawnita used to get her pills from some other street pharmacist and after switching to The Psi Discount plan she now only has to swallow two things a day!