On Tue, 19 Feb 2008 12:32:28 -0800 lwaynej <lwaynej@xxxxxxxxx> wrote: > Did you change display drivers about the time that this started > happening? If the driver sets the pixel clock too high it can cause > pixels to display wrong. Also, if the wrong values are chosen for the > PLL that controls the pixel clock you can get noise as well. With the objective of eliminating any driver problems I left that computer sitting at the bios setup screen for a while to see if the lines showed up there. And they did. As I just posted in a new thread, I have now got an ATI video card in this machine and have solved two problems (interference and the slow running machine) and found a new one (resolution setting is too low.) Thanks for your input! -- MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com