Weird unsettling show from my childhood [S]

Hello, I posted on Reddit about this but I thought I would put it here as well. When I was a kid, I remember watching this strange show, I don’t remember the premise, but I remember it was slightly unsettling and the visuals were just over-all grimy and dirty (in a literal sense). I think it was called mash box or juice box or something like that but I can’t find anything on it online. Am I just crazy or was this a real thing, and if so, help me find it. I vaguely remember something to do with a disembodied head and a strange clock, almost like the count down on a time bomb. I remember the visuals showed exposed wires and tubes and stuff like that, but it’s really hard to explain. I kinda remember some guy sitting in a gross chair but that’s a reach. So yeah, I know my description wasn’t much help but just do what you can. Thanks and best of luck!