Using The Worldwide Web; Preparing To Call Technical Support - HP LD4700 - Widescreen LCD Digital Signage Display User Manual

Problem
No sound.
Sound is too dull.
Sound is too low.
Screen has poor color resolution (16
colors).
Screen color is unstable or monocolored. Signal cable or video card connection is
Black spots appear on the screen.
The power suddenly turned off.

Using the Worldwide Web

For the online access to technical support information, self-solve tools, online assistance, community
forums of IT experts, broad mutlivendor knowledge base, monitoring and diagnostic tools, go to
http://www.hp.com/support

Preparing to Call Technical Support

If you can not solve a problem using the troubleshooting tips in this section, you may need to call
technical support. Contact your regional HP authorized service provider. Have the following information
available when you call:
●
Monitor model number
● Serial number for the monitor
●
Purchase date on invoice
●
Conditions under which the problem occurred
●
Error messages received
● Hardware configuration
●
Hardware and software you are using
34 Appendix A Troubleshooting
Possible Cause
Audio cable not connected.
Equalizer is not balanced.
Sound needs adjusting.
Color is not set correctly.
loose.
Characteristics of the LCD panel.
Sleep timer setting turned on or power
interrupted.
Solution
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.
ENWW