@zetof I think you are right... I've bought a sound isolator to try...
Thanks

You'd have to play around with the theme files. A while ago, I merged two themes to combine the best of both themes. It wasn't a heavy lift, mostly trial and error.

I put my recalbox out of service long term until there's support for Pi 4 to install my Pi 3 in my MAME cabinet, otherwise I'd get you the exact code to get rid of the line. I believe you need to set opacity to 0.

Despite being a separate system, the retropie wiki has excellent instructions on how to modify the theme files.

@abis1979 Possibly your computer is so new that there is still no integrated driver to Recalbox. Try a clean installation of the latest version of Recalbox, both the 32-bit version and the 64-bit version, if none works, you'll probably have to wait for an updated version of the system ...
Usually the incompatibility happens with the video card driver, but I can not say that's it.

@lbesnard Sorry, it was a translation failure.
Now I understand, but have you ever tried to modify the videomode as I mentioned?

@william_wong hi,

First of all, if this doesn't work with the pre-installed Retropie version, please refer to Retropie, but maybe the screen has an issue.

Anyway, we cannot be sure it'll work with Recalbox, as it may need some drivers or advanded configuration. Some further investigation is needed.

@deletedaccount you cannot. Please respect Recalbox and stop trying to make your own image.

Well, turnout i find out what was wrong, and the issue was my screen was defective, since it didn't work with Raspbian or Retropie with the configuration.
It was keep blinking but no image appeared.

I noticed that on my odroid xu4, too.

But as stated by @MegaTimX it would be an easy work around to make both image and video either black or white.

It would be more pleasing to the eye to have a black "boot" image imho. Most consoles use black or at least dark colors. Especially on LCD displays with a high brightness it looks generally better to display something dark rather then bright white.

Winscp if you're on windows

Ah thx, changing back to simplelight did the trick. To Bad that zoid wont work on full hd TVs 😞 I liked that theme a lot more