Philips 150X4FS Electronic User's Manual page 36

Troubleshooting
Imaging Problems
Display position is incorrect
Image vibrates on the screen
Vertical flicker appears
Horizontal flicker appears
The screen is too bright or too dark
An after-image appears
An afterimage remains after the power
has been turned off.
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Press the Auto button.
Adjust the image position using the
Horizontal Position and/or Vertical Position in
OSD Main Controls.
Check that the signal cable is properly
connected to the graphics board or PC.
Press the Auto button.
Eliminate the vertical bars using the Clock
Adjustment of VIDEO NOISE in OSD Main
Controls.
Press the Auto button.
Eliminate the horizontal bars using the Phase
Adjustment of VIDEO NOISE in OSD Main
Controls.
Adjust the contrast and brightness in OSD
Main Controls. (The backlight of the LCD
monitor has a fixed life span. When the
screen becomes dark or begins to flicker,
please contact your dealer.)
If an image remains on the screen for an
extended period of time, it may be imprinted
in the screen and leave an afterimage This
usually disappears after a few hours
This is characteristic of liquid crystal and is
not caused by a malfunction or deterioration
of the liquid crystal. The afterimage will
disappear after a period of time.