On Feb 17, 2008 11:39 AM, Frank Cox <<a href="mailto:theatre@sasktel.net">theatre@sasktel.net</a>> wrote: <div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I'm starting to think I have a different problem with this computer, that's not operating-system related. I occasionally have slowly-moving horizontal lines on my monitor that show up on the lighter coloured parts of my screen and travel upward. It seems to come and go, and looks for all the world like electrical interference. The lines are very small, maybe 15 per inch, and are mostly visible on the top half of the monitor. On a smaller monitor I might not even notice them, but on this 22" wide screen monitor it's distracting. I moved the computer further away from the monitor and changed its orientation but that didn't change anything. I also tried plugging the monitor and computer into different/separate electrical circuits and tried it without my UPS as well. Is there anything else I should be trying? I'm running out of ideas. </blockquote><div> I'm sure you've thought of this, but a routine check for overheating wouldn't hurt -- power supply, chip and case fans, etc. Dick S. </div></div> -- Dick Seabrook ~ Anne Arundel Community College <a href="http://enterprise.aacc.edu/~rhs">http://enterprise.aacc.edu/~rhs</a> ~ Speed the Net!