Flash jetpack 4.4

I acquired recently a jetson AGX Xavier and I start by installing the jetpack 4.4 by following the guide below:
Everything seems fine, but when I arrive to the point 3.6, on my jetson I see the nvidia logo and then a black screen.
And on the host PC (native linux 18.04), the skdmanager program expects the IP address, username and the password.
Does anyone know why I see a black screen?

And for more information id I make an ifconfig command I see a new connection:
enp0s20f0u3i5: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet netmask broadcast
inet6 fe80::7440:6d5f:ca48:2157 prefixlen 64 scopeid 0x20
ether 2a:77:1b:3e:4a:36 txqueuelen 1000 (Ethernet)
RX packets 434 bytes 77356 (77.3 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 198 bytes 45015 (45.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
but after a few seconds, I see that the network connection is lost

Thanks in advance.

Your network is likely functioning as expected, but ssh will time out and then drop due to not having an account to log in to prior to first boot setup. The real issue then is why first boot setup is failing.

You might try this script to add user name/pass and set timezone before you even flash:

I solved the problem by restarting the board with the reset button.
And I don’t know why, but I have to put on another monitor to see something.
My previous monitor has a DVI-HDMI converter and the new monitor has an HDMI connection without a converter. I don’t understand it, but it works for me.

My guess was that the DVI was analog, and did not include the DDC wire of digital.