I thought I now got everything understood from your and @~iceweasel
valuable discussion here... But I failed at the very beginning... OMG...
I got today my second brand new FireTV 4K build 2018 - shown on package. My first one - also an 2018 - which I updated to 18.104.22.168 by mistake is already sold to a friend whom do not care about rooting and stuff. I told him everything of course!
But now I stuck at "waiting for device" and nothing happens. I guess this stick has a quite old FW installed. It was 100% originally and not opened before. Im using latest FireISO on USB stick.
As far as I understood I should use only kamakiri 2.0.1 WITHOUT any shorting.
[[email protected] ~/Desktop/kamakiri]# ./bootrom-step.sh
[2023-01-05 13:51:18.465124] Waiting for device
After that, after a few seconds, the AFTMM Device shows on Desktop.
But nothing happens... Waited for some minutes...
Tried it several times. Used original USB cable. Tried it with other cables and OTG Y-cable as well... All the same...
What did I wrong? Or is it needed to short this old stick?
Found my balls again
and booted up to stick, with only MobilePhones Hotspot and only 2G data rate, skipped inital update with MENU + BACK, log in my account etc, set ADB +unknown devices ON - And checked the Version.... And of course cleared the updated files (after the pictures were made)... That all works without any new Software download/installation...
So I have as expected an very old FireOS 22.214.171.124 - Maybe this helps?!