Have had something similar before and with me removing the sd card before booting most of the times helped.

Hi, starting 2 days ago my battery started loading very slowly and now I do not see anything on screen, except for when I enter the menu to choose recovery, fastboot or normal boot (every choice gives black screen) Only noticable life is a vibrate when I connect to power adapter or press power long ...

do you also have this tutorial for a device that will not start after applying a small update of 69 MB?

is volume+ and power not working?

I applied, but now my new device is not working anymore.
Tried a lot, but no visible sign of activity on the phone.

Have not even used it as I received it this weekend.