Recently my MONITOR has fine lines appearing just at the TOP of the screen. I have a Compaq 7550 using an Nvidia MX100/200 64mb video card. I tried CHANGING the refresh rate which worked for about 1 hour and then the lines were back. I also tried changing the resolution. I can't tell if it is the monitor that is messed up or the video card. How do I rule out one or the other?? :-/Try that monitor on another machine and try another monitor on this machine. You'll be able to tell where the problem is soon enough. Video card artifacts maybe?The above exercise will determine the source of the problem. im pretty sure its the monitor. however u should test it the way gx1_man stated earlier.I don't have access to another monitor and I live in the sticks so, I tried dropping my refresh down to 60. That got RID of the lines but I am sure it is temporary. I have a feeling it is time to upgrade the monitor. Thanks for your help. Too BAD I can't use my Pocket PC as a test monitor.