Hey
I used another USB stick an it works

Now i have copyed all files to TV.
I now copyed th firmware T-CHL7DEUC-2005.0 to the same stick at the folder T-CHL7DEUC.
then i go to My Contents / Children / FFB and click at PLAY, any seconds later the tv reboot, but nothing changed?
Must i copy the firmware also to TV?
So that was a problem because i have not so many free space?
Or is it right to use the usb stick to store the firmware to downgrade?
THANKS
