@Smythius said in Intellivision was working and doesn't now.:

I think quicksilver may have found your issue as your BIOS files should be in /home/pi/RetroPie/BIOS/ and your setup appears to want them in your roms folder. You could try copying them there if they are not already and see if it works. My Intellivision retroarch.cfg just points to the global one in /opt/retropie/configs/all/retroarch.cfg I dont have any custom values in it other than the input remapping (maybe you have something else?) in the global file you should have system_directory = "~/RetroPie/BIOS"