Question about Compaq TFT8020 18.1" Flat Panel LCD Monitor

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Signal outof range - Compaq TFT8020 18.1" Flat Panel LCD Monitor

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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.
  • Posted on Aug 08, 2010

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