Philips 150B4CB Electronic User's Manual page 39

Troubleshooting
Horizontal flicker appears
The screen is too bright or too dark
An after-image appears
An after-image remains after the power
has been turned off.
Green, red, blue, dark and white dots
remain
For further assistance, refer to the
distributor.
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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 after-image. 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 after-image will
disappear after a given amount of time
The remaining dots are normal characteristic
of the liquid crystal used in today's
technology.
list and contact your local Philips