Problem
Possible cause Solution
Lines appear on
the background
screen.
Screen is out of
adjustment.
Adjust using the procedure described in
Optimizing analog images on page 46
.
Horizontal noise
appears or the
characters look
blurred.
Screen is out of
adjustment.
Adjust using the procedure described in
Optimizing analog images on page 46
.
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 for too
long a period of
time.
If you used a fixed image for a long time, the pixels might be damaged. Use a screen-
saver or one of the functions in the
ISM Method
option of the OSD menu.
No sound.
Audio cable not
connected.
Check that the audio cable is properly connected.
Adjust the volume.
Check the Speaker and Audio Source settings in the OSD.
Sound is too
dull.
Equalizer is not
balanced.
Check the audio settings for Balance, Treble, Bass, and Sound Mode.
Sound is too
low.
Sound needs
adjusting.
Adjust the volume.
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
→
(
Personalization
→
)
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.
Black spots
appear on the
screen.
Black spots are
characteristics
of the LCD
panel.
Refer to
Display quality and pixel policy on page 59
for more details.
The power is
suddenly turned
off.
Sleep timer
setting is turned
on, or power is
interrupted.
Check the
Schedule
submenu of the OSD.
Check the power control settings.
Power Button
Lockout
message
appears.
The sleep
button on the
back of the
display is
disabled.
Press the MENU and right arrow buttons on the back of the display and hold for 5
seconds.
Using Online Technical Support
For online access to technical support information, self-solve tools, online assistance, community
forums of IT experts, broad multi-vendor knowledge base, monitoring and diagnostic tools, go to
www.hp.com/support
ENWW
Using Online Technical Support
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