I need help, Screen Jumps up and down!

[other]

I'll try. Most likely it is becuase it is set to 50mhz (PAL) On my copy it does the same thing except that it is switchable. When it boots up look to see if you can see (between the jumpy lines) if you can set it to 60 (American). That should to the trick. Did you really rip it yourself or just dwnload an image file? If its from a premade image file you should be able to switch it.