With the track record that model of monitor has, I'd say it's pretty certain that it's the problem.
However, the best thing to make sure, is to try and hook up another PC to it and see how that goes. Then take it from there.
The only two options, besides the monitor itself, is the cable and the fact that you have only tried laptop computers.
Have you got another cable to try? Or could borrow one? And could you possible try it with a desktop computer?
If not, I would describe the case with all you have tried, and RMA it. If it is an option at all, return it to the store and get your money back instead, and buy a new one, as Asus service, depending on location, can be an exercise in futility and frustration.
Just a sidenote, but where did you get that amazing forum "status" indicator dysternaut (fragging frustrated). Has it been given to you or can you change it yourself somewhere? If it's given i wonder if it has different levels like other tags do.