Jetson nano power and display problem

Greetings…
I have five jetson nano developer kit, following the instructions (Getting Started With Jetson Nano Developer Kit | NVIDIA Developer) steps
three kit work very well and another two kit have problems
First one power problem ( power led not blink )
second one display problem (i did’t see any display my monitor)
how can solve this problem
Thank you
Ranjith

Please share the serial console log for those two problematic devkit.