HP LD4200tm User Manual page 47

Problem
Lines appear on the background
screen.
Horizontal noise appears or the
characters look blurred.
The screen displays abnormally.
An after image appears when the
display is turned off.
No sound.
Sound is too dull.
Sound is too low.
Screen has poor color resolution (16
colors).
Screen color is unstable or
monocolored.
Black spots appear on the screen.
The power suddenly turned off.
While upgrading the firmware, "Device
not found. Please check USB
connection" error message appears.
ENWW
Possible Cause
Screen is out of adjustment.
Screen is out of adjustment.
Using an incorrect Input signal.
Using a fixed image too long.
Audio cable not connected.
Equalizer is not balanced.
Sound needs adjusting.
Color is not set correctly.
Signal cable or video card connection is
loose.
Characteristics of the LCD panel.
Sleep timer setting turned on or power
interrupted.
The USB cable is not properly
connected from the display to the media
player/computer.
Solution
D-sub analog signal - press the AUTO
button on the remote control to
automatically select the optimal screen
status that fits into the current mode. If
the adjustment is not satisfactory, use
the Clock OSD menu.
D-sub analog signal - press the AUTO
button on the remote control to
automatically select the optimal screen
status that fits into the current mode. If
the adjustment is not satisfactory, use
the Phase OSD menu.
The proper input signal is not
connected to the signal port. Connect
the signal cable that matches with the
source input signal.
If you used a fixed image for a long
time, the pixels may be damaged. Use
a screen-saver function.
Check that the audio cable is properly
connected. Adjust the volume. Check if
the sound is set properly.
Select the appropriate sound equalize.
Adjust the volume by pressing the
volume buttons on the remote control.
Set the number of colors to more than
24 bits (true color). Select Control
Panel > Display > Settings > Color table
menu in the operating system.
Check the connection status of the
signal cable or reinsert the PC video
card.
Several pixels (red, green, white or
black color) may appear on the screen,
which can be attributable to the unique
characteristics of the LCD panel. It is
not a malfunction of the LCD.
Check that the sleep timer is set.
Check the power control settings.
If power is turned off after the message,
"CAUTION! FAN ERROR!" appears, the
fan is out of order. Contact your local
service center.
Check that the USB cable is properly
connected.
Solving Common Problems 39