Dreamcast Question

Forgive me if this is a dumb question but I just got one very recently and I turned the power on. Everyone works well and I am wondering, how does it turn off. I tried pushing the power button once but nothing happens unless I take one of the plugs out. Than I put the plug back in, it turns on instantly. Is this normal?

No, that's not normal. Sounds like the power button might be stuck. You might need to open the system up and clean things up around the button to get it to work. Or, if you got it from somewhere with a return policy, it might just be easier to return it for a different one.