PS2 turns on, than off. What to do?

I just found this in my garage after looking for a while. I got all the plugs together and when i tried to turn it on the light goes green, than turns back to red. Whats wrong and how can i fix it? It's a slim by the way

Sounds like maybe the power button has a loose wire, or the actual power supply is getting overloaded. I guess make sure all plugs are secure, but you may end up having to replace it.

you could try to mess with it, but most likely its broken. I'd say just buy another (used) ps2 if you want to play your ps2 games.