Hi,
before I format SD card and SSD, the jetson run smoothly on Jetpack 5.0.
I want to downgrade to jetpack 4.6, flashing new jetpack looking fine using belena, however the error occurs when to reboot.
There is a lot of difference between JetPack 4 and 5, especially in terms of bootloader.
So re-flashing only the SD card with Etcher is definitely not going to work.
Please do a whole re-flash with SDK Manager instead.