Attention, very important:
This is the ultimate solution for the settlement of the black screen on EVF4CSe / EVF4CHe.
This method is merit of DigitalVideo Spain, who kindly took to pass me the files. They are instructions + firmware + CInedown 3.3.
I leave here the link to the files and instructions.
The method is very easy and EVF4CHe screen or EVF4CSe back to life in a matter of minutes.
I hope this helps all who have had problems upgrading firmware.
Sorry for my English, I use a translator.
Greetings and good life.