Originally Posted by Godzil
You have to learn about ePaper ^^
ePaper have the particularity to does not change when you remove the battery, so it's completly normal that the screen does not blank out.
If it still does not boot correctly, try to redownload the update, in case of the first download failed somewhere
unfortunately (or fortunately) the installation was successful twice.
I'll try to downgrade the firmware after fully charging it.