Not exactly a noob here, but you'd forward me here anyway. Been on Kefir/Atmosphere since April, installed via Kefir bat file, injected hekate via TegraRCM (AutoRCM), had no issues.
>> Today home button stopped working and I've decided to reset, and after injecting payload now it goes to Kefir logo, then Atmosphere logo (more briefly than usual) and black screen. <<
I've updated hekate, atmosphere and kefir, same story. Did clean kefir install, no luck. Did atmosphere install with no kefir, just goes to hekate, and after launching Atmosphere same black screen. Did kefir helper tool, tried to enter Tegra explorer payload - system is accessible. Did the suggested "proper" atmosphere update complete with sigpatches, fusee, exosphere. Still the same. Even tried to clean install older kefir, hekate and atmosphere, all bad.
Usually, I can sort all this stuff myself and did a couple of times, but now I'm 3 hours into nothing at all and looks like nothing helps. There may be a chance that I could update the firmware at some point since April. Could it be the problem? And is there a way to downgrade firmware locally, when Switch doesn't turn on like this?