/vr/ - Retro Games

Figured this would be the best place to ask. These colours seem off from what I remember and what I've seen online. It's supposed to be a bright green, as are the dungeons but everything is red like this. I've fiddled with the settings on my CRT but nothing seems to work. Could it be a bad cartridge? Bad cable? I've unplugged and plugged in both and nothing seems to work. That's the only cartridge I have for the system at the moment, but my Tandy, TI99, and Megadrive all work fine.