This is my original Genesis I bought in like '92(?) with one of my first paychecks from my first job at Chuck E. Cheese's (yes I'm fucking old).
I thought I sold it years ago but found out it was sitting in one of my mom's closets, so I bought a few cheap carts and hooked it up to a crt I keep around for just such occasions. It still works!
I am so goddamn happy, I just had to share and I figured you all might appreciate that.
I've kept it this long because I too would like to preserve it, and up until a couple of years ago, it was running fine. I'll keep it in the garage for now and see if I can get it going again one of these days. I even brought home this old flat plasma screen that work was throwing away. This predates HDMI and digital signals. But its a big screen (40"+) for it's age and rather thin. It was probably a $10k screen at the time. I kept it around because one day I wanted to hook up the Genesis to it because it takes in analog inputs like component and composite (as well as VGA).
Sounds great, but I'll have you know you can buy a cable to connect to composite. That's how I hooked up mine to my modern TV. Works great. I have an old CRT too, that's where it's hooked up most of the time.