I had the same problem.
I recovered pw3 with this article.
https://www.mobileread.com/forums/sh...d.php?t=269099
However, I removed the diagnostic partition and kernel during the repair process,
I could not recover it.
Can anyone provide me with diagnostic partitions and kernels?
If so, please send it to my email address.
hana121024@yahoo.com
or,
Is there a way to log in to the Kindle system without using the Exit to login prompt in the Diags menu?