HP L1908w User Guide

							A Troubleshooting
Solving Common Problems
The following table lists possible problems, the possible cause of each problem, and the recommended
solutions.
ProblemPossible CauseSolution
Screen is blank.Power cord is disconnected.Connect the power cord.
Power switch on front panel of
the monitor is turned off.Press the front panel power button.
NOTE:If pressing the power button has no effect,
press and hold the power button for 10 seconds to
disable the power button lock-out feature.
Video cable is improperly
connected.Connect the video cable properly. Refer to Chapter
3, Setting Up the Monitor on page 5 for more
information.
Screen blanking is active.Press any key on the keyboard or move the mouse
to inactivate the screen blanking utility.
Image appears blurred, indistinct, or
too dark.Brightness and contrast are
too low.Press the —/Adjust button on the front panel. If this
does not correct the image, press the Menu button
to open the OSD Menu, and adjust the brightness
and contrast scales as needed.
Image is not centeredPosition may need adjustment.Press the Menu button to access the OSD menu.
Select Image Control/Horizontal Position or Vertical
Position to adjust the horizontal or vertical position
of the image.
Check Video Cable is displayed on
screen.Monitor video cable is
disconnected.Connect the DVI-D signal cable to the DVI connector
on the computer (select models), or the VGA cable
to the VGA connector on the computer. Be sure that
the computer power is off while connecting the video
cable.
Input Signal Out of Range. Change
Settings to 1280 x 1024 @ 60Hz or
Input Signal Out of Range. Change
Settings to 1440 x 900 @ 60Hz is
displayed on screen.Video resolution and/or refresh
rate are set higher than what
the monitor supports.Restart the computer and enter Safe Mode. Change
the settings to a supported setting (see 
RecognizingPreset Display Resolutions on page 42). Restart
the computer so that the new settings take effect.
HP Display LiteSaver doesnt turn off
the monitor screen.The Activity Extension time
has not elapsed.The default Activity Extension value is set to 10
minutes. The HP Display LiteSaver will wait to detect
no input or movement from the keyboard or mouse
for 10 consecutive minutes after the Display Off time
has passed, before the monitor enters into low-
power mode. For example, if the Display Off time is
set to 5 minutes from the current time and the Activity
Solving Common Problems 35
 
						

							ProblemPossible CauseSolution
Extension is set to 10 minutes, the HP Display
LiteSaver will not actually turn off the display until 10
minutes of inactivity has elapsed, even though the
Display Off time is 5 minutes from now.
The HP Display LiteSaver may
not be compatible with the
computer system. Some
notebook computers are not
compatible and the monitor
power can not be controlled.Confirm that the HP Display LiteSaver is compatible
with the system.
1.Right-click on the HP Display LiteSaver icon in
the system tray.
2.Select Power Off Display from the menu.
The monitor screen should turn off if the system is
compatible. To turn the monitor back on, wait 5
seconds and move the mouse.
NOTE:If the monitor did not turn off, then the
computer graphics driver is not compatible with the
HP Display LiteSaver software.
The monitor is off but it did not seem to
enter into a low-power sleep mode.The monitors power saving
control is disabled.Check the monitors OSD menu setting for power
saving enable/disable controls. The control should
be set to enable to allow the monitor to enter into low-
power modes.
OSD Lock-Out is displayed.The monitors OSD Lock-out
function is enabled.Press and hold the Menu button for 10 seconds to
disable the OSD Lock-out function.
Power Button Lock-Out is displayed. The monitors Power Button
Lock-out function is enabled.Press and hold the power button for 10 seconds to
unlock the power button function.
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 cannot solve a problem using the trouble shooting tips in this section, you may need to call
technical support. Have the following information available when you call:
●The monitor
●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
36 Appendix A   Troubleshooting
 
						

							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.
L1750 Model
Table B-1  L1750 Specifications
Display
Type17 inches
TFT LCD43.2 cm
Viewable Image Size17–inch diagonal43.2 cm
Tilt-5 to 35°
Swivel-45 to 45°
Maximum Weight (Unpacked)15 lbs.6.8 kg
Dimensions (include base)
Height
Depth
Width
18.59 inches
11.86 inches
14.85 inches47.2 cm
30.1 cm
37.7 cm
Maximum Graphic Resolution1280 × 1024 (75 Hz) analog input
1280 × 1024 (75 Hz) digital input (select
models)
Optimum Graphic Resolution1280 x 1024 (60Hz) analog input
1280 x 1024 (60Hz) digital input (select
models) 
Text Mode720 × 400
Dot Pitch0.264 (H) × 0.264 (W) mm
Horizontal Frequency24 to 83 kHz
Vertical Refresh Rate50 to 77 Hz
Environmental Requirements Temperature
Operating Temperature
Storage Temperature41 to 95° F
-29 to 140° F5 to 35° C
-20 to +60° C
L1750 Model 37
 
						

							Relative Humidity20 to 80% 
Power Source90 — 265 VAC, 45/63 Hz 
Altitude:
Operating
Storage
0 to 12,000 feet
0 to 40,000 feet0 to 3657.6 m
0 to 12192 m
Power Consumption (maximum)
						

							Power Source90 — 265 VAC, 45/63 Hz 
Altitude:
Operating
Storage
0 to 12,000 feet
0 to 40,000 feet0 to 3657.6 m
0 to 12192 m
Power Consumption (maximum)
						

							Power Consumption (maximum)
						

							L1908w Model
Table B-5  L1908w Specifications
Display
Type19 inches
TFT LCD48.3 cm
Viewable Image Size19–inch diagonal48.3 cm
Tilt-5 to 25°
Maximum Weight (Unpacked)12.42 lbs.5.63 kg
Dimensions (include base)
Height
Depth
Width
14.58 inches
7.35 inches
17.56 inches37.0 cm
18.7 cm
44.6 cm
Maximum Graphic Resolution1440 x 900 (75 Hz) analog input
Optimum Graphic Resolution1440 x 900 (60Hz) analog input 
Text Mode720 × 400
Dot Pitch0.285 (H) × 0.285 (W) mm
Horizontal Frequency24 to 83 kHz
Vertical Refresh Rate50 to 76 Hz
Environmental Requirements Temperature
Operating Temperature
Storage Temperature
41 to 95° F
-29 to 140° F5 to 35° C
-20 to 60° C
Relative Humidity20 to 80% 
Power Source90 — 265 VAC, 45/63 Hz 
Altitude:
Operating
Storage
0 to 12,000 feet
0 to 40,000 feet0 to 3657.6 m
0 to 12192 m
Power Consumption (maximum)
						

							Recognizing Preset Display Resolutions
The display resolutions listed below are the most commonly used modes and are set as factory defaults.
This monitor automatically recognized these preset modes and they will appear properly sized and
centered on the screen.
L1750, L1950, L1710, and L1910 Models
Table B-6  Factory Preset Modes
PresetPixel FormatHorz Freq (kHz)Vert Freq (Hz)
1640 × 48031.560.0
2640 × 48037.973.0
3640 × 48037.575.0
4720 × 40031.570.0
5800 × 60037.960.0
6800 × 60048.172.0
7800 × 60046.975.0
8832 × 62449.775.0
91024 × 76848.460.0
101024 × 76856.570.0
111024 × 76860.075.0
121152 × 87068.775.0
131152 × 90071.776.0
141280 × 102464.060.0
15 1280 × 1024 80.0 75.0
L1908w Model
Table B-7  Factory Preset Modes
PresetPixel FormatHorz Freq (kHz)Vert Freq (Hz)
1640 × 48031.559.9
2640 × 48037.575.0
3720 × 40031.570.1
4800 × 60037.960.3
5800 × 60046.975.0
6832 × 62449.774.5
7 1024 × 768 48.4 60.0
42 Appendix B   Technical Specifications
 
						

							81024 × 76860.075.0
91152 × 72044.960.0
101152 × 87068.775.1
111152 × 90061.866.0
121280 × 76847.460.0
131280 × 96060.060.0
141280 × 102464.060.0
151280 × 102480.075.0
16 1440 x 900 55.9 59.9
Entering User Modes
The video controller signal may occasionally call for a mode that is not preset if:
●You are not using a standard graphics adapter.
●You are not using a preset mode.
It this occurs, you may need to readjust the parameters of the monitor screen by using the on-screen
display. Your changes can be made to any or all of these modes and saved in memory. The monitor
automatically stores the new setting, then recognized the new mode just as it does a preset mode. In
addition to the factory preset modes, there are four user modes that can be entered and stored.
Energy Saver Feature
When the monitor is in its normal operating mode, the monitor uses less than 37 watts and the Power
light is green.
The monitor also supports a reduced power state. The reduced power state will be entered into if the
monitor detects the absence of either the horizontal sync signal and/or the vertical sync signal. Upon
detecting the absence of these signals, the monitor screen is blanked, the backlight is turned off, and
the power light is turned amber. When the monitor is in the reduced power state, the monitor will utilize
less than 2 watts of power. There is a brief warm up period before the monitor will return to its normal
operating mode.
Refer to the computer manual for instructions on setting energy saver features (sometimes called power
management features).
NOTE:The above power saver feature only works when connected to computers that have energy
saver features.
By selecting the settings in the monitors Energy Saver utility, you can also program the monitor to enter
into the reduced poser state at a predetermined time. When the monitors Energy Saver utility causes
the monitor to enter the reduced power state, the power light blinks amber.
Table B-7  Factory Preset Modes (continued)
Entering User Modes 43
 
						

							C Agency Regulatory Notices
Federal Communications Commission Notice
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
●Reorient or relocate the receiving antenna.
●Increase the separation between the equipment and the receiver.
●Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
●Consult the dealer or an experienced radio or television technician for help.
Modifications
The FCC requires the user to be notified that any changes or modifications made to this device that are
not expressly approved by Hewlett Packard Company may void the users authority to operate the
equipment.
Cables
Connections to this device must be made with shielded cables with metallic RFI/EMI connector hoods
to maintain compliance with FCC Rules and Regulations.
Declaration of Conformity for Products Marked with the
FCC Logo (United States Only)
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1.This device may not cause harmful interference.
2.This device must accept any interference received, including interference that may cause
undesired operation.
For questions regarding the product, contact:
44 Appendix C   Agency Regulatory Notices