Hi @SK02 ,
Thank you so much for your interest in our products and for using our community.
regarding your issue, could you please verify the following power configuration?
1: The adapter is connected to J43
2: The SW5 power switch is turned ON
3: J38 is set to pins 1–2 to select the external 5 V input
Once these settings are confirmed, the board power rails—including those supplying the Arduino interface—should be available.
Please try it.
Best Regards
May