Last December I own my Asus TF700T. I didn't have problems, except for some automatic restarts.
The thing is now I can see lines that appear quickly and randomly on the screen. I think it has to do with the OS, because it appears some times when I activate the taskbar, but it also invariably happens in the web browser or books reader.
Is this a hardware problem? Or is an Android issue, considering the lines appear a few days later I've moved to 4.1.
Thanks for your attention.