66 chapter 10 troubleshooting – HP LD4245tm 41.92-inch Interactive LED Digital Signage Display User Manual
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The audio function does not work.
Cause
Solution
No sound?
See if the audio cable is connected properly.
Adjust the volume.
See if the sound is set properly.
Sound is too dull.
Select the appropriate equalize sound.
Sound is too low.
Adjust the volume.
Screen color is abnormal.
Cause
Solution
Screen has poor color resolution (16 colors).
Set the number of colors to more than 24 bits (true color)
Select Control Panel - Display - Settings - Color Table menu
in Windows.
Screen color is unstable or mono-colored.
Check the connection status of the signal cable. Or, reinsert
the computer video card.
Do black spots appear on the screen?
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.
The operation does not work normally.
Cause
Solution
The power suddenly turned off.
Is the sleep timer set?
Check the power control settings. Power interrupted.
66 Chapter 10 Troubleshooting