Question about Samsung 997DF 19" CRT Monitor

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Screen Distortion at certain Refresh Rates

Hello, My 997DF has had a certain problem ever since I tried hooking up my laptop to it. The picture is horrendously stretched except at certain refresh rates. I use 1024x768, and 800x600. In the former, 85hz displays an accurate picture. In the latter 100 does as well. Any other refresh rate makes the entire screen distort. Again, before my laptop was hooked up to this monitor, it worked beautifully. What can be done?

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Re: Screen Distortion at certain Refresh Rates

Have you connected the laptop to another monitor and use the same refresh rates that cause the distortion? If the distortion appears on a different monitor, then I would have your laptop examined by a pc engineer, but, if the distortion only appears on the 997DF monitor, I suggest having the monitor checked at a repair shop, also, have you tried connecting the 997DF to a desktop PC, and use the same refresh rates?

Posted on Jun 17, 2007

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  • Make sure the pins on the video cable are not bent or damaged.
  • Make sure there are no extension cables or switch boxes attached to the monitor.
  • Verify that you have the proper drivers installed for the video card.
  • Verify the problem at all possible resolutions and refresh rates.
  • Make sure the refresh rate does not exceed maximum value for any resolution.
  • Test the monitor on a different computer.
  • Contrast is recommended to be set at a higher range while the brightness should be set at middle range. This helps to increase the text clarity while reducing the bright background.
  • If your monitor is equipped with moire control, adjusting this may improve the clarity of the text. Moire is a wavy distortion pattern caused by interference between the dot pitch of the CRT and the picture signal. The pattern may vary depending on the screen amplitude, contrast, brightness, and other characteristics of the input signal.
  • Monitor's performance may be affected by the Earth's magnetic field. Try rotating the monitor to different directions to improve misconvergence.
  • Most video cards offer a software utility that changes the frequencies and sync polarities for all resolutions. If the setup does not match with the monitor's characteristics, an incorrect signal may be displayed on the screen. Sometimes, the image may also appear blurry.
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    reduce the resolution to a bit lower and the refresh rate to a nominal 60hz and things should get back to normal

    my hunch is u r using a slightly high resolution and refresh rates

    but before that try the buttons on the monitor to see if expanding the image sideways or top and bottom would help initially

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