@ssssq
So why did you think the Problem lies with you Recalbox ?
Did it worked before ?
If yes maybe now it's a Problem with your Files or CHDMAN

If you didn't know, the CHDMAN Help can be find here:
https://wiki.recalbox.com/en/tutorials/utilities/rom-conversion/chdman

@Djoni-Wes

i'm trying the quasi88 emulator

Hi! I don't use this emulator, and my best reference about it is the libretro documentation:
https://docs.libretro.com/library/quasi88/

As I don't know much about this emulator, what I can suggest is that you check your BIOS.
Also, what version of Recalbox are you using (say the version, don't say "the latest")?
Did you build your Recalbox yourself, or are you using a ready-made image from the internet as a base?
Can you test on another computer and see if the result is better?

@havens1515 https://forum.recalbox.com/topic/20996/can-t-access-nes-rom-recalbox-manager

@voljega it is already done for 6.1. Homebrew might need special configuration (maybe not), but it should be possible to configure the emulator for them.

@paradadf It ended up that I had uploaded the .rar of my rom instead of the .bin. Once I extracted the .bin, it worked.

@subs j'ai pourtant bien parlé du boitier dans mon premier post ...

@delferius yes. You should activate them in deconfig.

@PUCH84 That's perfect then ! :=)