I guess you got the wrong device number, it should be mmcblk0 for eMMC
the usb serial adapter arrived these days and i can’t wait to read the boot logs. I’ll keep you updated and thanks for your availability.
I correctly executed the dd command with mmcblk0 this is the situation after giving dd and then sync
solved, I apologize for the post but I mistakenly hadn’t extracted the img file inside the bz2 archive.
on the second pc windows doesn’t show known file extensions and i was reading .img
now after extracting the file with the command
bzip2 -d starfive-jh7110-202302-eMMC-minimal-desktop.img.bz2
all right, started at first.
thank you all but unfortunately my free time to devote myself to the board is very little and I made a rookie mistake