At present, we use the official Ubuntu system which has been configured in advance (without any changes to the underlying system) and packaged it as an IOS image. When we use it, we record it to the memory card and insert the nano board.
At present, when using the same batch of memory cards, the nano board will only display the NVIDIA logo image when it is turned on, and cannot enter the system. Serial port printing card in “starting kernel…”
After testing, the problem can be solved by re installing the system or replacing other development boards.