
Problem
Possible cause
Solution
Unknown
Product
message
appears when
the display is
connected.
Display driver is
not installed.
Install the display driver, which is provided with the display or download from the HP
website
www.hp.com
.
See if the Plug and Play function is supported by referring to the video card user
manual.
Key Lock On
message
appears when
pressing the
Menu button.
Key Lock
function is
turned on.
The control locking function prevents unintentional OSD setting changes. To unlock the
controls, simultaneously press the Menu button and right arrow button for several
seconds. (You cannot set this function using the remote control buttons. You can set
this function with the display only.)
The screen
looks abnormal;
screen position
is wrong.
Screen is out of
adjustment.
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.
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.
Lines appear on
the background
screen.
Screen is out of
adjustment.
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.
Horizontal noise
appears or the
characters look
blurred.
Screen is out of
adjustment.
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.
The screen
displays
abnormally.
Using an
incorrect input
signal.
The proper input signal is not connected to the signal port. Connect the signal cable
that matches with the source input signal.
An after image
appears when
the display is
turned off.
Using a fixed
image that is
too long.
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
.
No sound.
Audio cable not
connected.
Check that the audio cable is properly connected.
Adjust the volume.
Check if the sound is set properly.
Sound is too
dull.
Equalizer is not
balanced.
Select the appropriate sound equalize.
Sound is too
low.
Sound needs
adjusting.
Adjust the volume by pressing the volume buttons on the remote control.
Screen has
poor color
resolution (16
colors).
Color is not set
correctly.
Set the number of colors to more than 24 bit (true color). Select
Control Panel
Display
Settings
Color quality
in the operating system.
Screen color is
unstable or
mono colored.
Signal cable or
video card
connection is
loose.
Check the connection status of the signal cable, or reinsert the media player/computer
video card.
82
Appendix A Troubleshooting
ENWW
2nd Draft
Содержание LD4210
Страница 2: ...HP LD4201 LD4210 and LD4710 Digital Signage Displays User Guide 2nd Draft ...
Страница 5: ...iv About this guide ENWW 2nd Draft ...
Страница 13: ...xii ENWW 2nd Draft ...
Страница 19: ...6 Chapter 2 Safety and maintenance guidelines ENWW 2nd Draft ...
Страница 39: ...26 Chapter 3 Setting up the display ENWW 2nd Draft ...
Страница 93: ...80 Chapter 6 Installing HP Network Sign Manager ENWW 2nd Draft ...
Страница 97: ...84 Appendix A Troubleshooting ENWW 2nd Draft ...
Страница 105: ...92 Appendix B Technical specifications ENWW 2nd Draft ...
Страница 143: ...130 Appendix C Command reference ENWW 2nd Draft ...
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Страница 160: ...Regulatory Information cont 11 Estonian Latvian Lithuanian ...