I've recently installed SteamOS on my friend's computer, and it ran "okay" initially (low frame rate and mysteriously dim screen), but after I ran
and rebooted it will only give me a black screen and hang until I power it of, which I then see a terms and agreements pop up for a brief second before powering off. My friend's computer is a Sony VAIO ModelNum: SVF15N17CXB.

Here are the hardware specifications for the laptop.