There must be a way to use my laptop screen as a monitor for like a ps2 right? I looked into s-video cable questions but I'm not exactly sure if thats what I need in my case. thanks in advance.
you can do it with an external USB2 video capture device. It will have a video in. Any cheap one should do.
looking online, Sabrent has one with no external power needed for $30. SABRENT TV-USB20 USB 2.0 Interface USB 2.0 TV Tuner/Video Capture Box with Remote Control - Retail