Eizo FlexScan L578 User Manual page 35

Whenever an error signal message appears, the signal
frequency will be displayed in red.
(Example)
3. Display position is incorrect.
4. Vertical bars of distortion appear.
5. Horizontal bars of distortion appear.
6. Letters and lines appear blurred.
7. The screen is too bright or too dark.
8. Afterimages appear.
9. The screen has defective pixels (e.g. slightly light or
dark).
10. Fingerprints remain on the screen.
Use the graphics board's utility
software to change the frequency
setting. (Refer to the manual of the
graphics board.)
Adjust the image position using the
<Position>.
If the problem persists, use the
graphics board's utility software to
change the display position if available.
Decrease the vertical bars using the
<Clock>.
Decrease the horizontal bars using the
<Phase>.
Adjust the blurred lines using
<Smoothing>.
Adjust the <Brightness> (The
backlight of the LCD monitor has a
fixed life span. When the screen
becomes dark or begins to flicker,
please contact your dealer.).
Do you use the screen saver or timer
when displaying the same image for
extended periods of time?
Afterimages are particular to LCD
monitors. Avoid displaying the same
image for extended periods of time.
This is due to the characteristics of the
panel itself, and not the LCD product.
Leaving the screen white may solve
the problem.