i am almost unexperienced in embedded stuff and i need some help with TX2. I have booted Jerpack 3.1 and everything was seeming ok. But when i power on the jetson USB ports do not work. If i set the jetson in recovery mode and restart this time usb ports work. And even the heatsink get extremely hit fan never starts. I have tried to execute jetson_clocks.sh but it replies cant access fan. I have read this issue may be related to something called dtb ? I am totally new to this stuff. What is dtv? can anyone explain how to overcome these problemes with really basic explanation.