Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
Thank you very much for this quick answer!
That's because you did not commented all hdmi lines in your config.txt : at the end : # NOOBS Auto-generated Settings: hdmi_force_hotplug=1 config_hdmi_boost=4
