HP LD4730 User Guide - Page 65

Troubleshooting, Solving common problems

Get HP LD4730 PDF manuals and user guides View all HP LD4730 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 65 highlights

A Troubleshooting Solving common problems The following table lists possible problems, the possible cause of each problem, and the recommended solutions. Problem Possible cause Solution No image is displayed. Power cord is not connected. Be sure the power cord is properly connected to the outlet. ● Verify that the outlet has power to it. ● Check that the fuse or breaker has not tripped or burned out. See if the power switch is turned on. Might need service. Power is on, power indicator is green, but the screen appears extremely dark. Screen needs adjustment. Adjust brightness, backlight and contrast again. Backlight might need repair. Power indicator is red. Display is in power saving mode. No video signal is active. Press power button ( ) on the back of the display. Activate a signal source. Turn off equipment and then back on. Select an active input or set Auto Detection in the OSD menu to on. Out of Range message appears. Input signal is out of frequency range. The signal from the media player/computer (video card) is out of the vertical or horizontal frequency range of the display. Adjust the frequency range. NOTE: Vertical Frequency - To enable the user to watch the display, the screen image should change multiple times every second like a fluorescent lamp. The vertical frequency or refresh rate is the number of times the image displays per second. The unit is measured in Hz. Horizontal Frequency - The horizontal interval is the time to display one vertical line. When 1 is divided by the horizontal interval, the number of horizontal lines displayed every second can be tabulated as the horizontal frequency. The unit is measured in kHz. Solving common problems 59

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
A
Troubleshooting
Solving common problems
The following table lists possible problems, the possible cause of each problem, and the recommended
solutions.
Problem
Possible
cause
Solution
No image is
displayed.
Power cord is
not connected.
Be sure the power cord is properly connected to the outlet.
●
Verify that the outlet has power to it.
●
Check that the fuse or breaker has not tripped or burned out.
See if the power switch is turned on.
Might need service.
Power is on,
power indicator
is green, but the
screen appears
extremely dark.
Screen needs
adjustment.
Adjust brightness, backlight and contrast again.
Backlight might need repair.
Power indicator
is red.
Display is in
power saving
mode.
No video signal
is active.
Press power button (
) on the back of the display.
Activate a signal source.
Turn off equipment and then back on.
Select an active input or set
Auto Detection
in the OSD menu to on.
Out of Range
message
appears.
Input signal is
out of frequency
range.
The signal from the media player/computer (video card) is out of the vertical or
horizontal frequency range of the display. Adjust the frequency range.
NOTE:
Vertical Frequency
— To enable the user to watch the display, the screen
image should change multiple times every second like a fluorescent lamp. The vertical
frequency or refresh rate is the number of times the image displays per second. The unit
is measured in Hz.
Horizontal Frequency
— The horizontal interval is the time to display one vertical
line. When 1 is divided by the horizontal interval, the number of horizontal lines
displayed every second can be tabulated as the horizontal frequency. The unit is
measured in kHz.
Solving common problems
59