Gaming

I BOUGHT A USED XBOX AND CAN'T GET IT TO WORK. WHEN YOU TURN IT ON IT GOES TO THE SCREEN WITH MEMORY, MUSIC, XBOX LIVE AND SETTINGS. I CAN GO INTO THOSE BUT I CAN'T GET A GAME TO LOAD.

I ALSO HAVE ANOTHER ONE THAT THE LIGHT FLASHES RED AND GREEN ON.

PLEASE HELP

I need help,after playing my PS 2 earlier today and not having any problems,I went back today to play some more and now nothing happens when I push the game controller buttons or start button,the game loads perfectly and will work when I select between the memory card and disc though.But when it gets to the part that says load or start new game the controllers do nothing at all,I tried moving the controllers around with no change and even tried others games.Any help would be great!

I am in need of an AV switch for 5+ game consoles but am unsure of what I should be looking for.  The one I have currently is about 7 years old and is causing distortion to the picture as well as the sound.  I really am not looking to spend too much, but want to purchase one that will last as the newer systems come out.  It has to be able to support a PS3 whereas that was my newest purchase.  Any ideas/ comments would be greatly appreciated.