Philips 150S6FB/27 Service Manual page 18

18
The following table lists possible Image problems, and the recommended resolutions.
Image Problems
Having this problem?
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 after-image remains after the power has
been turned off.
Green, red, blue, and white dots remains
Trouble Shooting
Check these items
· 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 on OSD Main Controls.
· 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 period of time.
· The remaining dots are normal characteristic of the liquid crystal
used in today s technology.