My computer is stuck on standby. what do I do.

My computer is stuck on standby. what do I do.

I've had my DELL 4500S home COMPUTER IN STORAGE for over a year. Tried to hook it up and it wont turn on. The light is orange. I think its stuck on standby. I tried restarting it but I get the same thing. And there doesn't seem to be connection between the computer and monitor. It is in standby also