Please clarify whether this is custom carrier board or devkit.
Are you using sdcard module or emmc module?
What does that mean “system cannot start normally”? Desktop not able to launch or the boot up stuck in somewhere?
If you don’t know what I am talking about, check the boot log with the uart console first.
Both of them were used. Before, I always replied to change the version and brush the machine. I was responsible for RMA after-sales of Ruitai new era Beijing Technology Co., Ltd., so I tried these methods before asking questions