TFT Monitor with Fuzzy Display

TFT Monitor fuzzy display problems are almost always caused by one (or more) or the following issues:

  • Wrong display resolution.  As mentioned elsewhere, TFT Monitors must be configured to use their Native Resolution in the PCs display settings.  Failing to do this will always cause the display to be fuzzy or blurred - or to have jagged edges on diagonal lines and a 'lumpy' looking display.
  • Poor adjustment.  If the display resolution is correct, then the monitor has to be correctly adjusted to get the best picture quality.  This is usually only an issue with analogue monitors.  If the digital (DVI) input is used, then further adjustment of the monitor should not be required.  Initially, the monitors "Auto-Adjustment" can be used to try and improve the display quality.  This is best used with a program producing a test pattern of vertical lines, with a single pixel white border showing the exact edge of the screen.  Given this, most monitors will auto-adjust perfectly well.  If the display is still not perfect, a very slight manual adjustment will usually achieve the expected quality.
  • Poor quality cables.  Analogue monitors are susceptible to signal degradation from either poor quality or excessively long signal cables.  Also, joining or extending cables is likely to cause ghosting effects on the display, usually seen as light and dark vertical lines.
  • Faulty graphics cards or other component.   Sometimes, replacing a CRT monitor with a TFT monitor requires the display resolution be set higher than was previously in use.  We have seen a number of systems with older graphics cards which while perfectly OK at 800 x 600 resolution on a 15" CRT had very bad interference like effects when set to 1280 x 1024.  The problems were generally either power supply or graphics card related - but had the appearance of a faulty monitor.

By carefully checking the above, almost all fuzzy and blurred display problems can be resolved.