HP LD4201 User Manual page 55

Problem
Key Lock On
message
appears when
pressing the
Menu button.
The screen looks
abnormal;
screen position
is wrong.
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
mono colored.
ENWW
Possible Solution
cause
Key Lock The control locking function prevents unintentional OSD setting changes. To unlock the
function is controls, simultaneously press the Menu button and right arrow ► button for several
turned on. seconds. (You cannot set this function using the remote control buttons. You can set this
function with the display only.)
Screen is out of D-sub analog signal - press the AUTO button on the remote control to automatically select
adjustment. the optimal screen status that fits into the current mode.
Check that the video card resolution and frequency are supported by the display. If the
frequency is out of range, set to the recommended resolution in the Control Panel →
Display → Settings of the operating system.
Screen is out of D-sub analog signal - press the AUTO button on the remote control to automatically select
adjustment. the optimal screen status that fits into the current mode.
Screen is out of D-sub analog signal - press the AUTO button on the remote control to automatically select
adjustment. the optimal screen status that fits into the current mode.
Using an The proper input signal is not connected to the signal port. Connect the signal cable that
incorrect input matches with the source input signal.
signal.
Using a fixed If you used a fixed image for a long time, the pixels might be damaged. Use a screen-
saver function or set the OSD menu to the ISM Method.
image for too
long a period of
time.
Audio cable not Check that the audio cable is properly connected.
connected.
Adjust the volume.
Check if the sound is set properly.
Equalizer is not Select the appropriate sound equalize.
balanced.
Sound needs Adjust the volume by pressing the volume buttons on the remote control.
adjusting.
Set the number of colors to more than 24 bit (true color). Select Control Panel →
Color is not set
correctly. Display → Settings → Color quality in the operating system.
Signal cable or Check the connection status of the signal cable, or reinsert the media player/computer
video card video card.
connection is
loose.
Solving common problems 47