When the TV SYSTEM (your TV type) does not match to the STB setting, TV screen and/or audio may not
show properly.
In that case, you need to switch off the STB, and press power button -> menu button and hold -> up/down
direction button-> OK on the front panel until you see your TV type.
If you can open and see the Main menu, you can adjust on the menu.
Caution: If you use some of HD modes (720por 1080i) SCART output is not functional.
Time to reinstall and test