KV Kindle Voyage 5.13.1 Serial Jailbreak Help

Hi, New member here so be gentle.
Quite some experience with arduinos, uart serial and Linux/Windows.

Brought a used Kindle Voyage from ebay which came with 5.13.1, sucks right :(

Seems I can't get the uboot 'Hit any key to stop autoboot: 1 ' message all the serial jailbreak threads I read seem to show.
Yes I've tried mashing a key at on battery connect.

While my soldering job couldn't have gone worse, I'm still able to TX/RX because I am able to read the kernel boot log as well and write into the fully-booted login prompt (in which the python root password generator doesn't work).
I'm just hoping amazon didn't find a way to patch uboot or maybe I might have overlooked something.

Attached is the log for whomever is interested

Thanks for your time.
Regards

Attached Files

minicom log.txt (5.2 KB)