I have also the same problem with my "Kindle Touch" screen appears me "tree", and I've tried several things to indicate on this page without satisfactory results as:
1. Making diags and kernel version match in 5.0.0 and 5.0.1 respectively, sending them with fastboot.
2. Put to charge my Kindle touch fastboot mode for 4 hours, without changes to report.
3. Change how the Kindle to "MAIN" without satisfactory results, the only difference is that now sees it as USB storage device.
I appreciate a lot of attention and if someone already found the solution please let me refer to the appropriate forum or send me the procedure to my mail.