Turn the device off, be sure one end of your USB Cable is plugged into the PC / Laptop
Press Power + Volume up, While you press both Power and Volume up insert the USB Cable into the phone, then Keep pressed and you should enter into the recovery, You used to be able to do this without the USB Cable, but recent changes made you require to plug it into a device.
Itseems to works, I have now a green screen saying Downloading...But how long did it takes ? because it was began for 10 minutes now and notging more happen ? thank for help !