Jetson AGX does not show any signal on the screen with the LED on

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
4

Hi,

so i have tried to follow the steps suggested in this post Setting up a serial console for debug - #2 by mehmetdeniz

After i connect the microusb it is clear that the computer detects something. This is the result of lsusb:

lsusb
lsusb1012×162 35.5 KB

and the result of detected usb after conecting in /dev/

dev

then following the instructions of the mentioned post, i select the corresponding parameters in the gtkterm

gtkterm
gtkterm850×610 36 KB

I have tried with ttyUSB0, ttyUSB1, ttyUSB2, ttyUSB3 and nothing happens, the screen is black and there is no response.

I have also reboot many times and change the cable but the result is the same, black screen an no response.

am i doing something wrong?

Many thanks,