HP LD4235 User Manual page 72

After-image appears on the product.
Cause
After-image appears when the product is turned off.
The audio function does not work.
Cause
No sound?
Sound is too dull.
Sound is too low.
Screen color is abnormal.
Cause
Screen has poor color resolution (16 colors).
Screen color is unstable or mono-colored.
Do black spots appear on the screen?
The operation does not work normally.
Cause
The power suddenly turned off.
62 Chapter 9 Troubleshooting
Solution
If you use a fixed image for a long time, the pixels may be
damaged quickly. Use the screen-saver function.
When a dark image is displayed on the screen after an image with
high contrast (black and white or gray), this may cause image
sticking. This is normal for LCD screen.
Solution
See if the audio cable is connected properly.
Adjust the volume.
See if the sound is set properly.
Select the appropriate equalize sound.
Adjust the volume.
Solution
Set the number of colors to more than 24 bits (true color) Select
Control Panel - Display - Settings - Color Table menu in Windows.
Check the connection status of the signal cable. Or, reinsert the
computer 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.
Solution
Is the sleep timer set?
Check the power control settings. Power interrupted.