I have an Atari 2600....or it might be an Atari 5200. I really don't know which. I know it is a working machine; however, I can't get it to come on. We seem to have only one cord which goes from the machine to the TV. My husband says that we are missing a part. Can anyone help with any information regarding the "start up" of this machine. I wanted to surprise my older kids with this for Christmas.