Team-Xecuter Community

Hello guys, originally I was running on sysnand with FW 5.1 and emunand with FW 6.1. The emunand is on file based SD.
I was trying to upgrade my emunand to FW 7.0.1 using ChoiDujourNX last night. The update was smooth and successful. Then I selected power off the switch so that I can plug my phone to load the payload. When the switch booted again, the sx os logo was shown, but after that it turned out to black screen. I tried waiting for over 10 minutes and nothing changed.
Thx to the file based structure, I can rolled back to 6.1 easily. However, I would like to know did I do anything wrong or did I miss something?
Thanks.