Troubleshooting - Philips TFT LCD Colour Monitor Service Manual

15 190B4 LCD

TROUBLESHOOTING

This page presents problems that can be corrected by the user.
If the problem still exists after these possible solutions, a further
action has to be take by authorized technicians.
˙ Make sure the Power cable is plugged
No Picture
(Power LED not to the wall and back of the monitor.
˙ Make sure the DC power cord has
lit)
been attached to the DC jack.
˙ First, power button in front of the
monitor should be in the OFF position,
then press it to ON position again.
˙ Make sure the computer is turned on.
No Picture
˙ Make sure the signal cable is properly
(Power LED is
Amber or Yellow connected to your computer.
˙ Check to see if the monitor cable has
In color)
bent pins.
˙ The Energy Saving Feature may be
activated.
˙ Make sure the monitor cable is properly
Screen says
connected to your computer.
˙ Check to see if the monitor cable has
bent pins.
˙ Make sure the computer is turned on.
˙ The Auto Function is designed for use
AUTO button not
working on standard Macintosh or
˙ IBM-compatible PC running Microsoft
properly
Windows.
It may not work properly if using
non-standard PCs or video card.
Imaging
Problems
˙ Push the AUTO button.
Display position
is Incorrect Adjust the image position using the
Horizontal Position & / or Vertical
Position in the Second Window.
˙ Check that the signal cable is properly
Image vibrates
on the screen connected to the graphics board or PC
Trouble Shooting
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,
dark and white
dots remain on
the screen
˙ Push the AUTO button.
˙ Eliminate the vertical bars using the
Clock Adjustment in the FIRST
Windows.
˙ Push the Auto button.
˙ Eliminate the horizontal bars using the
Phase Adjustment in the First
Windows.
H-Noise
(BEFOR)
˙ Adjust the contrast and brightness
using the First Windows.
(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 in the screen for an
extended period of time, it may be
imprinted in the screen and leave an
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 set
amount of time.
˙ The remaining dots are normal
charactericstic of the liquid crystal used
in today's technology.
No Noise
(AFTER)