Sysnand cfw problems and questions

[BananaFartman]

Switch: V2 Mariko
Hwfly: v4, newest firmware
Problem: atmosphere wont boot. Black screen after logo
What I already tried: insert jig and boot info rcm to retrain, delete all files from sd card and place them again
Firmware: all newest installed on ofw, 14.1.2, newest for sd carry

Questions:
Is there a known way to fix it?
Upgrading should be done using daybreak? If not on ofw or cfw?
After installation I've heard that you cannot simply access Hekate by rebooting. How to access it?

I used rentry guide to install atmosphere on sysnand cfw, Mariko guide but without sigpatches.

 

[impeeza]

RCM on a V2 unit? if the unit is patched RCM Mode will not allow to inject payloads, or am I wrong?

 

[BananaFartman]

RCM on a V2 unit? if the unit is patched RCM Mode will not allow to inject payloads, or am I wrong?

I've read that it enforces retraining on the modchip

 

[impeeza]

cool, thanks.

 

[BananaFartman]

cool, thanks.

I have no idea if thats true, I've got that from reddit and it didnt help in my case. I am referencing topics "nintendo_switch_with_hwfly_chip_stopped_working" or "hwfly_chip_purple_flashing_and_then_straight_to".
No idea if that works and should be done.