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Troubleshooting
A good starting point is to gather some data of what is happening. For this you can hook the board up to your computer using a using a UART cable. This enables you to see what is happening in the Linux console using a Serial Port Monitor software like PuTTY, MobaXTerm, or Arduino IDE. Using the UART connection you will also be able to login to your Linux installation. From there you can run terminal commands like in any regular Linux command-line interface.
By collecting data and logs you can start a topic under Discussions to engage in discussion with other users how to resolve your specific problem.
Note: The correct baud speed and COM settings are required or your monitor will just show you gibberish. Be aware of cheap PL2303x UART cables. They might not support your board's baud speed, or not transfer the intact data. A higher quality UART chip like FT232/FT232R/FT232RL/FT232BL might save you a lot of trouble.