Bricked kindle after step 14

[ramjke]

After doing all the steps I saw the log messages appear after the final reboot saying the jailbreak was finished.
After the reboot it booted back up to the screen from step 2 with the text fields. I went along and it booted back into managed mode but now ;demo, ;enter_demo, and ;uzb do nothing, and USB access isn't working.

Now I stuck with no wifi and no usb access, so I can't do nothing.

Reboot does not help. (tried multiple times)