If there is no image on the screen maybe your TV
doesn't support PAL system.
If there is no image then complete next steps:
Unplug power of STB
Press and hold “Menu” button on RC (direct your RC to STB)
Plug power on STB with holding “Menu” button
Hold “Menu” button during 5-10 seconds.
Switch PAL - NTSC with single press on red button “F1” on RC.