Template: Jetson Nano Xavier NX Dev Kit FAQ
From Waveshare Wiki
The cooling fan in the NX-FAN-PWM is adjustable with PWM signal, the system will auto-run it if the temperature reach threshold, you can also refer to #FAN about how to control it manually.
Please check if you have connected the display tightly, and please use HDMI or DP display. And please use the newest image and test it again.
If you require technical support, please go to the Support page and open a ticket.