I have such a problem.
I installed the SX Core (seems to be the original one) to my Switch v2.
The problem is that once a blinking blue LED appears and Hekate appears - then I run Atmo. I can restart this several times and it’s OK, but some time the console starts in OFW and the chipe LED is off. It also happens when the console is running for a while, I will turn it off and after turning it on, the chip no longer responds. When I unplug the chip from the eMMC connector and plug it back in, the chip usually restarts correctly. What could be the reason? I have already checked the soldering of the chip to the capacitors several times - everything looks OK. There are no short circuits, I can not see any damage.
Has anyone had a similar problem?
Sorry for my english.