Thank you very much for this quick answer!

I have put the roms on the SD itself. I'm using recalbox OS 4.0.1 @substring

Hello,

I'm usually the guy that goes on google to find answers but it seems i'm the only one having this issue.
Basically, for the NES, GB, MegaDrive and GBA emulator, i have to following problem:

When i launch a game for the first time, everything works perfectly. No issue whatsoever.
But once i close the game, if i launch any other title of the same console, i will get a black screen but still i will hear the game audio. If i reboot the box, i can play once again... For one game. I can hear the game running, but i have no video.

I don't have this issue with Neo Geo, SNES, GW, scummvm.

I tried enabling the safe_hdmi mode but it didn't change anything. I can try to mess around in the recalbox.config file, but i thought you might want to hear about this issue.
This is to make a present for my elder brother, so i would love if somehow someone could point to me the solution. I tried googling very hard but found no answers.

Anyways thanks for your awesome work on recalbox and thanks in advance for those who help!