Ok here are my specs Power Mac g5 dual 1.8ghz pci-x 8 gb ddr ram two 1.5 TB hard drive wifi card installed nvidia mx5000 standard graphics card Here is the issue When I boot and press "option" to select a hard drive or disk everything looks fine but when I load into either the OS or a OS install disk there are long light green lines going from the apple all the way to the right end of the screen in a straight line. And when it boots most dark colors look fine , but in white boxes and at the top menu bar there are either long light green lines or very small to large green blocks , they are translucent but they are there. I have done everything I can think of. Ive re installed the os, re seated the graphics card re seated all the ram. PMU reset, Pram reset, ran hardware check from the os disk, ran tech tools pro , EVERYTHING nothing helps. I think it may be the graphics card. Can I get any input?