HP Ld4700 User Guide

							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 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.
May need service.
Power is on, power indicator is blue, but
the screen appears extremely dark.Screen needs adjustments. Adjust brightness and contrast again.
Backlight may need repair.
Power indicator is amber. Monitor in power saving mode. Move the mouse or press any key on
the keyboard.
Turn off equipment and then back on.
Out of Range message appears. Input signal is out of frequency range. The signal from the PC (video card) is
out of the vertical or horizontal
frequency range of the monitor. Adjust
the frequency range by referring to the
specifications in this manual (maximum
resolution: RGB - 1920 x 1080 @ 60Hz;
HDMI - 1920 x 1080 @ 60Hz).
NOTE:Vertical Frequency - to enable
the user to watch the monitor display,
screen image should be changed tens
of times every second like a fluorescent
lamp. The vertical frequency or refresh
rate is the times of image display 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.
ENWWSolving Common Problems 33
 
						

							Problem Possible Cause Solution
Check signal cable message appears. Signal cable is not connected. The signal cable between the PC and
monitor is not connected.
Check the signal cable.
Press the INPUT button on the remote
control to check the input signal.
“Unknown Product” message appears
when the monitor is connected.Monitor driver is not installed. Install the monitor driver, which is
provided with the monitor or download
from the HP Web site
(
http://www.hp.com).
See if the plug & play function is
supported by referring to the video
card’s user manual.
“Key Lock On” message appears when
pressing the Menu button.Key Lock function is turned on. The control locking function prevents
unintentional OSD setting change due
to careless usage. To unlock the
controls, simultaneously press the
Menu button and ► button for several
seconds. (You cannot set this function
using the remote control buttons. You
can set this function in the monitor
only.)
The screen looks abnormal; screen
position is wrong.Screen is out of adjustment. D-sub analog signal - press the AUTO
button on the remote control to
automatically select the optimal screen
status that fits into the current mode. If
the adjustment is not satisfactory, use
the Position OSD menu.
Check that the video card resolution
and frequency are supported by the
monitor. If the frequency is out of range,
set to the recommended resolution in
the Control Panel > Display > Setting
menu of the operating system.
Lines appear on the background
screen.Screen is out of adjustment. D-sub analog signal - press the AUTO
button on the remote control to
automatically select the optimal screen
status that fits into the current mode. If
the adjustment is not satisfactory, use
the Clock OSD menu.
Horizontal noise appears or the
characters look blurred.Screen is out of adjustment. D-sub analog signal - press the AUTO
button on the remote control to
automatically select the optimal screen
status that fits into the current mode. If
the adjustment is not satisfactory, use
the Phase OSD menu.
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
monitor is turned off.Using a fixed image too long. If you used a fixed image for a long
time, the pixels may be damaged. Use
a screen-saver function.
34 Appendix A   Troubleshooting ENWW
 
						

							Problem Possible Cause Solution
No sound. Audio cable not connected. Check that the audio cable is properly
connected. Adjust the volume. Check if
the sound is set properly.
Sound is too dull. Equalizer is not balanced. Select the appropriate sound equalize.
Sound is too low. Sound needs adjusting. Adjust the volume by pressing the
volume buttons on the remote control.
Screen has poor color resolution (16
colors).Color is not set correctly. Set the number of colors to more than
24 bits (true color). Select Control Panel
> Display > Settings > Color table menu
in the operating system.
Screen color is unstable or
monocolored.Signal cable or video card connection is
loose.Check the connection status of the
signal cable or reinsert the PC video
card.
Black spots appear on the screen. Characteristics of the LCD panel. 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 power suddenly turned off. Sleep timer setting turned on or power
interrupted.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.
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
ENWWUsing the Worldwide Web 35
 
						

							B Technical Specifications
NOTE:All performance specifications are provided by the component manufacturers. Performance
specifications represent the highest specification of all HPs component manufacturers typical level
specifications for performance and actual performance may vary either higher or lower.
HP LD4200 LCD Monitor
Table B-1  HP LD4200 Specifications
Display
Type106.73 cm
TFT LCD42 inches
Viewable Image Size 106.73 cm diagonal 42-inch diagonal
Pixel Pitch 0.681 mm x 0.681 mm  
Maximum Weight
Without Stand & Speaker
With Speaker
With Stand
With Stand & Speaker19.70 kg
20.40 kg
23.00 kg
23.80 kg43.43 lbs.
44.97 lbs.
50.71 lbs.
52.47 lbs.
Dimensions (Without Stand & Speaker)
Height
Depth
Width58.76 cm
11.39 cm
99.56 cm23.1 inches
4.5 inches
39.2 inches
Dimensions (With Speaker)
Height
Depth
Width58.76 cm
12.57 cm
99.56 cm23.1 inches
4.9 inches
39.2 inches
Dimensions (With Stand)
Height
Depth
Width67.6 cm
29.3 cm
99.56 cm26.6 inches
11.5 inches
39.2 inches
Dimensions (With Stand & Speaker)
Height
Depth
Width67.6 cm
29.3 cm
99.56 cm26.6 inches
11.5 inches
39.2 inches
36 Appendix B   Technical Specifications ENWW
 
						

							Table B-1  HP LD4200 Specifications (continued)
Power
Rated VoltageAC 100-240 V~ 50/60 Hz 2.2 A
Japan: AC 100 V~ 50/60 Hz 2.2 A 
Power Consumption
On Mode
Sleep Mode
Off Mode220W Typical
≤ 1W (RGB) / 4W (HDMI/DVI)
≤ 1W 
Maximum Resolution
RGB
HDMI/DVI1920 x 1080 @ 60Hz
1920 x 1080 @ 60Hz (if supported by OS or video card type)
Recommended Resolution
RGB
HDMI/DVI1920 x 1080 @ 60Hz
1920 x 1080 @ 60Hz (if supported by OS or video card type)
Horizontal Frequency
RGB
HDMI/DVI30 - 83kHz
30 - 83kHz 
Vertical Frequency
RGB
HDMI/DVI56 - 76Hz
56 - 60Hz 
Synchronization Type Composite/Separate/Digital  
Input Connector 15-pin D-Sub type, HDMI (digital), S-Video, Composite Video,
Component, RS-232C
Environmental Conditions
Operating Temperature
Storage Temperature0 ~ 35° C, Humidity 10% ~ 80%
-20 ~ 60° C, Humidity 5% ~ 90% 
Audio (Select Models)
RMS Audio Output
Input Sensitivity
Speaker Impedance10W + 10W (R+L)
0.7 rms
8 Ohms 
ENWWHP LD4200 LCD Monitor 37
 
						

							HP LD4700 LCD Monitor
Table B-2  HP LD4700 Specifications
Display
Type119.28 cm
TFT LCD47 inches
Viewable Image Size 119.28 cm diagonal 47-inch diagonal
Pixel Pitch 0.5415 mm x 0.5415 mm  
Maximum Weight
Without Stand & Speaker
With Speaker
With Stand
With Stand & Speaker26.08 kg
26.83 kg
29.56 kg
30.84 kg57.50 lbs.
59.15 lbs.
65.17 lbs.
67.99 lbs.
Dimensions (Without Stand & Speaker)
Height
Depth
Width66.10 cm
11.87 cm
111.70 cm26.02 inches
4.67 inches
43.98 inches
Dimensions (With Speaker)
Height
Depth
Width66.10 cm
11.87 cm
111.70 cm26.02 inches
4.67 inches
43.98 inches
Dimensions (With Stand)
Height
Depth
Width75.78 cm
30.26 cm
111.70 cm29.83 inches
11.91 inches
43.98 inches
Dimensions (With Stand & Speaker)
Height
Depth
Width75.78 cm
30.26 cm
111.70 cm29.83 inches
11.91 inches
43.98 inches
Power
Rated VoltageAC 100-240 V~ 50/60 Hz 2.2 A
Japan: AC 100 V~ 50/60 Hz 2.2 A 
Power Consumption
On Mode
Sleep Mode
Off Mode300W Typical
≤ 1W (RGB) / 4W (HDMI/DVI)
≤ 1W 
Maximum Resolution
RGB
HDMI/DVI1920 x 1080 @ 60Hz
1920 x 1080 @ 60Hz (if supported by OS or video card type)
38 Appendix B   Technical Specifications ENWW
 
						

							Table B-2  HP LD4700 Specifications (continued)
Recommended Resolution
RGB
HDMI/DVI1920 x 1080 @ 60Hz
1920 x 1080 @ 60Hz (if supported by OS or video card type)
Horizontal Frequency
RGB
HDMI/DVI30 - 83kHz
30 - 83kHz 
Vertical Frequency
RGB
HDMI/DVI56 - 76Hz
56 - 60Hz 
Synchronization Type Composite/Separate/Digital  
Input Connector 15-pin D-Sub type, HDMI (digital), S-Video, Composite Video,
Component, RS-232C
Environmental Conditions
Operating Temperature
Storage Temperature0 ~ 35° C, Humidity 10% ~ 80%
-20 ~ 60° C, Humidity 5% ~ 90% 
Audio (Select Models)
RMS Audio Output
Input Sensitivity
Speaker Impedance10W + 10W (R+L)
0.7 rms
8 Ohms 
Recognizing Preset Display Resolutions
The display resolutions listed below are the most commonly used modes and are set as factory
defaults. This monitor automatically recognizes these preset modes and they will appear properly
sized and centered on the screen.
HP LD4200 and LD4700 Preset Display Modes
Table B-3  HP LD4200 and LD4700 Factory Preset Display Modes
Preset Pixel Format Horz Freq (kHz) Vert Freq (Hz)
1 720 x 400 31.468 70.8
*2 640 x 480 31.469 59.94
3 640 x 480 37.5 75
*4 800 x 600 37.879 60.317
5 800 x 600 46.875 75
6 832 x 624 49.725 74.55
*7 1024 x 768 48.363 60
8 1024 x 768 60.123 75.029
ENWW Recognizing Preset Display Resolutions 39
 
						

							Table B-3  HP LD4200 and LD4700 Factory Preset Display Modes
(continued)
Preset Pixel Format Horz Freq (kHz) Vert Freq (Hz)
*9 1280 x 720 44.772 59.855
*10 1280 x 1024 63.981 60.02
11 1280 x 1024 79.98 75.02
*12 1600 x 1200 75 60
*13 1680 x 1050 65.290 60
*14 1920 x 1080 67.5 60
1 ~14 RGB Mode
* HDMI/DVI Mode
DTV Mode
 Component HDMI/DVI (DTV)
480i o x
480p o o
576i o x
576p o o
720p o o
1080i o o
1080p o o
NOTE:DTV/PC selection on RGB and HDMI/DVI inputs is available for PC resolutions 640 x
480/60Hz, 1280 x 720/60Hz, 1920 x 1080/60Hz and DTV resolutions: 480p, 720p, 1080p.
Power Indicator
Mode Indicator Light
On Mode Blue
Sleep Mode Amber
Off Mode  
40 Appendix B   Technical Specifications ENWW
 
						

							C Controlling the Multiple Product
Use this method to connect several monitors to a single computer. You can control several monitors
at a time by connecting them to a single computer.
Connecting the Cable
Connect the RS-232C cable as shown in the following illustration. The RS-232C protocol is used for
communication between the computer and the monitor. You can turn the monitor on/off, select an
input source or adjust the OSD menu from the computer.
RS-232C Configurations
7-Wire Configurations
(Standard RS-232C cable) 3-Wire Configurations
(Not Standard)
 PC   Monitor    PC   Monitor 
RXD 2
3TXD RXD23TXD
TXD 3
2RXD TXD32RXD
GND 5
5GND GND55GND
DTR 4
6DSR DTR4    6DSR
DSR 6
4DTR DSR6    4DTR
RTS 7
8CTS RTS7    8CTS
CTS 8
7RTS CTS8    7RTS
  D-Sub
(Female) D-Sub 9
(Female)     D-Sub
(Female) D-Sub 9
(Female) 
ENWWConnecting the Cable 41
 
						

							Communication Parameter
●Baud Rate: 9600buadRate (UART)
●Data Length: 8bits
●Parity Bit: None
●Stop Bit: 1bit
●Flow Control: None
●Communication Code: ASCII code
●Use a crossed (reverse) cable
Command Reference List
 COMMAND1 COMMAND2 DATA1 DATA2 DATA3
01. Power k a 00H -01H    
02. Input Select k b 02H -09H    
03. Aspect Ratio k c 01H -09H    
04. Screen Mute k d 00H -01H    
05. Volume Mute k e 00H -01H    
06. Volume Control k f 00H -64H    
07. Contrast k g 00H -64H    
08. Brightness k h 00H -64H    
09. Color k i 00H -64H    
10. Tint k j 00H -64H    
11. Sharpness k k 00H -64H    
12. OSD Select k l 00H -01H    
13. Remote Lock/ key Lock k m 00H -01H    
14. Balance k t 00H -64H    
15. Color Temperature k u 00H -03H    
16. Abnormal state k z FFH    
17. ISM mode j p 00H -10H    
18. Auto configuration j u 01H    
19. Key m c Key Code    
20. Tile Mode d d 00H -55H    
21. Tile H Position d e 00H -64H    
22. Tile V Position d f 00H -64H    
23. Tile H Size d g 00H -64H    
24. Tile V Size d h 00H -64H    
42 Appendix C   Controlling the Multiple Product ENWW