TFT Monitor Fuzzy Display or Blurred Display Problems
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.