HP L1940T 19" LCD Monitor
User Guide
Enhanced for Accessibility
© 2006 Hewlett-Packard Development
Company, L.P.
Microsoft, Windows, and the Windows logo
are trademarks of Microsoft Corporation in
the U.S. and other countries.
All other product names mentioned herein
may be trademarks of their respective
companies.
Hewlett-Packard Company shall not be liable
for technical or editorial errors or omissions
contained herein or for incidental or
consequential damages in connection with
the furnishing, performance, or use of this
material. The information in this document is
provided “as is” without warranty of any kind,
including, but not limited to, the implied
warranties of merchantability and fitness for
a particular purpose, and is subject to
change without notice. The warranties for
Hewlett-Packard products are set forth in the
express limited warranty statements
accompanying such products. Nothing
herein should be construed as constituting
an additional warranty.
This document contains proprietary
information that is protected by copyright. No
part of this document may be photocopied,
reproduced, or translated to another
language without the prior written consent of
Hewlett-Packard Company.
Second Edition (September 2006)
Document Part Number: 407540–002
About This Guide
This guide provides information on setting up the monitor, installing drivers, using the o n-screen display
menu, troubleshooting and technical specifications.
WARNING! Text set off in this manner indicates that failure to follow directions could result in
bodily harm or loss of life.
CAUTION Text set off in this manner indicates that failure to follow directions could result in
damage to equipment or loss of information.
NOTE Text set off in this manner provides important supplemental information.
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iii
ENWWiv About This Guide
Table of contents
1 Product Features
HP L1940T ........................................................................................................................................... 1
2 Safety and Maintenance Guidelines
Important Safety Information ........................... . .... ..... .. ... .... ... .... ... .. ..... ... .. ..... .... .. .... .... .. ... ..... ............... 2
Maintenance Guidelines ................................. ..... ........ ........ ..... ....... ....... ..... ........ ....... ..... ..................... 2
Cleaning the Monitor ................................ ............................................................................ 3
Shipping the Monitor ................................ .... ... .... .... ... .... ..... .. ..... ..... .. ..... ..... .. ..... .... ... ... ........ 3
3 Setting Up the Monitor
Unfolding the Monitor Base .................................................................................................................. 4
Rear Components ................................................................................................................................ 5
Selecting the Signal Connectors and Cables ....................................................................................... 5
Connecting the Monitor ........................................................................................................................ 7
Adjusting the Monitor ........................................... ....... ... ..... ....... ... ..... ....... ... ..... ....... ... ............ ... ........... 8
Turning on the Monitor ....................................................................................................................... 10
Mounting Solutions .................................... ..... .. ..... ..... .... ..... ..... .. ..... ..... ... .... ..... ... ..... ..... .. ............. .. .... 10
Removing the Monitor Pedestal Base ............................................................................... 10
Mounting the Monitor ......................................................................................................... 11
Locating the Rating Labels ................................................................................................................. 13
4 Operating the Monitor
Software and Utilities .......................................................................................................................... 14
The Information File ................................... .. ..... ... ... .... ..... .. ..... ..... .. ..... ... .... ... ..... .. ..... ..... .. .. 14
The Image Color Matching File .......................................................................................... 14
Installing the .INF and .ICM Files ....................................................................................................... 15
Installing from the CD ........................................................................................................ 15
Downloading from the Worldwide Web .............................................................................. 15
Using the Auto-Adjustment Function .................................................................................................. 15
Front Panel Controls .......................................................................................................................... 17
Adjusting the Monitor Settings .............................. .... ..................................... . .................................... 18
Using the On-Screen Display Menu .................................................................................. 18
Using the HP Display Assistant Utility ............................................................................... 22
Identifying Monitor Conditions ............................................................................................................ 23
Sleep Timer Mode .............................................................................................................................. 23
HP Display LiteSaver ......................................................................................................................... 24
Installing the HP Display LiteSaver Software .................................................................... 24
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OSD Menu Selections ....................... ........................ .. ...................................... 18
Optimizing Digital Conversion ........................................................................... 22
v
sRGB Support .................................................................................................................................... 25
Changing the Color Temperature ...................................................................................... 25
Installing the sRGB ICM File for Microsoft Windows 2000 and Windows XP .................... 26
Appendix A Troubleshoot in g
Solving Common Problems .................................... .. ..... ..... .. ..... ..... .. ..... ..... .. ..... ..... ... .... ..... ... ............. 27
Using the Worldwide Web .......................... ................................................. .. ..................................... 28
Preparing to Call Technical Support ................................................................................................... 28
Appendix B Technical Specifications
L1940T 19” LCD Monitor ........................... ... ........................................................... .. ......................... 29
Recognizing Preset Display Resolutions .......................................... ..... ....... ... ..... ....... ... ..... ....... ... ..... 30
Entering User Modes .......................................... ....... ... ..... ....... ... ..... ....... ... ..... ....... ... ....... .................. 31
Energy Saver Feature ........................................................................................................................ 31
Appendix C Agency Regulatory Notices
Federal Communications Commission Notice ................................................................................... 32
Modifications ...................................................................................................................... 32
Cables ................................................................................................................................ 32
Declaration of Conformity for Products Marked with the FCC Logo (United States Only) ................. 32
Canadian Notice ............................................................ ... .................................................................. 33
Avis Canadien .................................................................................................................................... 33
European Union Regulatory Notice .................................................................................................... 33
German Ergonomics Notice ............................................................................................................... 34
Japanese Notice .................................... ..... ...... .... ..... ....... ... ....... ..... ... ....... ..... ... ....... ...... ............ ........ 34
Korean Notice ........................................ ... ....... ...... .. ....... ...... .... ..... ....... ... ..... ....... ... ....... ........... .... ...... 34
Power Cord Set Requirements ...................................................................... .. ................................... 34
Japanese Power Cord Requirements .................... .. .......................................................... 34
Product Environmental Notices ............................ .. .... ... .. ..... ... .. .... .. ..... ... .. .... .... .. .... .... .. .... .... . ......... .. . 35
Materials Disposal ............................................................................................................. 35
Disposal of Waste Equipment by Users in Private Household in the European Union ..... 35
Restriction of Hazardous Substances (RoHS) .................... .. ............................................. 35
Appendix D LCD Monitor Quality and Pixel Policy
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1 Product Features
HP L1940T
The flat panel monitor has an active matrix, thin-film transistor (TFT), liquid crystal display (LCD). The
monitor features include:
Large 19-inch (48.3 cm) viewable area display with narrow bezels
●
1280 × 1024 native resolution, plus full-screen support for lower resolutions
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Wide viewing angle to allow viewing from a sittin g or standing position, or moving side-to-side
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Pivot capability to rotate display to portrait mode
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Tilt, swivel, and height adjustment capabilities
●
Easily removable base for flexible panel mounting with the optional HP Flat Panel Monitor Quick
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Release or other panel mounting solutions
Video inputs that support DVI digital signal (available on select models) and VGA analog inputs
●
One power cable and one VGA signal cable included
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USB 2.0 hub with one upstream (connects to the computer or to a USB hub) and two downstrea m
●
(connects to USB devices) ports
Accessory rail on monitor to accept optional mounted devices, such as an HP speaker bar
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Plug and play capability if supported by the system
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On-Screen Display (OSD) adjustments in English, Dutch, French, German, Italian, Simplified
●
Chinese, and Spanish for easy setup and screen optimization
Software and documentation CD that includes HP Display Assistant, Pivot Pro software, monitor
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driver software, and product documentation
Energy Saver feature for Energy Star compliance
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Intelligent Management Asset Control
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Compliant with the following regulated specifications:
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European Union CE Directives
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Swedish MPR II 1990
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Swedish TCO Requirements
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Energy Star
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HP L1940T 1
2 Safety and Maintenance Guidelines
Important Safety Information
A power cord is included with the monitor. If another cord is used, use only a power source and
connection appropriate for this monitor. For information on the correct power cord set to use with the
monitor, refer to the Power Cord Set Requirements section in Appendix C.
WARNING! To reduce the risk of electric shock or damage to the equipment:
• Do not disable the power cord grounding feature. The grounding plug is an important safety
feature.
• Plug the power cord in a grounded (earth) outlet that is easily accessible at all times.
• Disconnect power from the product by unplugging the power cord from the electrical outlet.
For your safety, do not place anything on power cords or cables. Arrange them so that no one
may accidentally step on or trip over them. Do not pull on a cord or cable. When un plugging from
the electrical outlet, grasp the cord by the plug.
To reduce the risk of serious injury, read the Safety and Comfort Guide. It describes proper
workstation, setup, posture, and health and work habits for computer users, and provides
important electrical and mechanical safety information. This guide is located on the Web at
http://www.hp.com/ergo and/or on the documentation CD, if one is included with the monitor.
CAUTION For the protection of the monitor, as well as the computer, connect all power cords
for the computer and its peripheral devices (such as a monitor, printer, scanner) to some form of
surge protection device such as a power strip or Uninterruptible Power Supply (UPS). Not all
power strips provide surge protection; the power strips must be specifically labeled as having this
ability. Use a power strip whose manufacturer offers a Damage Replacement Policy so yo u can
replace the equipment, if surge protection fails.
Maintenance Guidelines
To enhance the performance and extend the life of the monitor:
Do not open the monitor cabinet or attempt to service this product yourself. Adjust only those
●
controls that are covered in the operating instructions. If the monitor is not operating properly or
has been dropped or damaged, contact an authorized HP dealer, reseller, or service provider.
Use only a power source and connection appropriate for this monitor, as indicated on the label/
●
back plate of the monitor.
Chapter 2 Safety and Maintenance Guidelines 2
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Be sure the total ampere rating of the products connecte d to the outlet does not exceed the current
●
ra
ting of the electrical outlet, and the total ampere ra ting of the products connected to the cord does
not exceed the rating of the cord. Look on the power label to determine the ampere rating (AMPS
or A) for each device.
Install the monitor near an outlet that you can easily reach. Disconnect the monitor by grasping the
●
plug firmly and pulling it from the outlet. Never disconnect the monitor by pulling the cord.
Turn the monitor off when not in use. You can substantially increase the life expectancy of the
●
monitor by using a screen saver program and turning off the monitor when not in use.
Slots and openings in the cabinet are provided for ven tilation. These openings must no t be blocked
●
or covered. Never push objects of any kind into cabinet slots or other openings.
Do not drop the monitor or place it on an unstable surface.
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Do not allow anything to rest on the power cord. Do not walk on the cord.
●
Keep the monitor in a well-ventilated area, away from excessive light, heat or moisture.
●
When removing the monitor pedestal base, you must lay the monitor face down on a soft area to
●
prevent it from getting scratched, defaced, or broken.
Cleaning the Monitor
1. Turn off the monitor and the computer.
2. Unplug the monitor from the wall outlet.
3. Clean the monitor plastics with a clean cloth dampened with water.
4. Clean the monitor screen with an antistatic screen cleaner.
CAUTION Do not use benzene, thinner, ammonia, or any other volatile substances to clean
the monitor or the screen. These chemicals may damage the ca binet finish as well as the screen.
Shipping the Monitor
Keep the original packing box in a storage area. You may need it later if you move or ship the monitor.
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Maintenance Guidelines 3
3 Setting Up the Monitor
To set up the monitor, ensure that the power is turned off to the monitor, computer system, and other
attached devices, then follow the instructions below.
Unfolding the Monitor Base
The monitor is shipped with the base attached in a folded fl at po sitio n. To be gin us ing the mo nitor, you
must unfold the base (1)and place the monitor in an upright position (2).
Figure 3-1 Unfolding the Pedestal Base
Chapter 3 Setting Up the Monitor 4
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Rear Components
Figure 3-2 Rear Components
Component Function
1 AC Power Connector Connects the AC power cord to the monitor.
2 USB Downstream
Connectors
3 USB Upstream
Connector
4 DVI-D Connector (select
models)
5 VGA Connector Connects the VGA signal cable to the monitor.
Connects optional USB devices to the monitor.
Connects the monitor USB hub to a host USB port/hub.
Connects the DVI-D signal cable to the monitor.
Selecting the Signal Connectors and Cables
The monitor features one DVI-D connector and one VG A connector capable of supporting either digita l
or analog input.
The video mode is determined by the connector and video cable used.
For digital operation, use an optional DVI-D signal cable. Connect the DVI-D si gnal cable to a DVI-
●
D connector on the monitor (1) and the other end to the DVI-D connector on the computer (2).
For analog operation, use the VGA signal cable provided . Connect the VGA signal ca ble to a VGA
●
connector on the monitor (1) and the other end to the VGA connector on the computer (2).
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The monitor will automatically determine wh ich inputs have valid video signals. The inputs can be
selected through the On-Screen Display (OSD) feature by pressing the Menu button on the front panel
or by pressing the + button to enable VGA signal input or the − button to enable DVI signal input.
Rea
r Components 5
Figure 3-3 Connecting the DVI-D Signal Cable (not included with monitor)
Figure 3-4 Connecting the VGA Signal Cable
Chapter 3 Setting Up the Monitor 6
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Connecting the Monitor
1. Place the monitor in a convenient, well-ventilated location near the computer.
2. Connect one end of the USB hub cable to the USB connector on the rear panel of the computer
(2) or to a USB hub, and the other end to the upstream USB connector on the monitor (1).
Figure 3-5 Connecting the USB Hub Cable (not included with monitor)
WARNING! To re
• Do not disable the power cord grounding plug. The grounding plug is an important safety
feature.
• Plug the power cord into a grounded (earthed) electrical o utlet tha t is easily accessible at
all times.
• Disconnect power from the equipment by unplugging the power cord from the electrical
outlet.
For your safety, do not place anything on power cords or cables. Arrange them so that no
one may accidentally step on or trip over them. Do not pull on a cord or cable. When
unplugging from the electrical outlet, grasp the cord by the plug.
duce the risk of electric shock or damage to the equipment:
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Connecting the Monitor 7
3. Connect one end of the power cable to the AC power connector on the back of the monitor (1),
and the other end to an electrical wall outlet (2).
Figure 3-6 Connecting the Power Cable
Adjusting the Monitor
1. Tilt the monitor's panel forward or backward to set it to a comfortable eye level.
Figure 3-7 Tilting the Monitor
Chapter 3 Setting Up the Monitor 8
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2. Swivel the monitor to the left or right for the best viewing angle.
Figure 3-8 Swiveling the Monitor
3. Adjust t
Figure 3-9 Adjusting the Height
he monitor's height so that it is parallel to your eye height for a comfortable viewing position.
CAUTION To prevent damage to the monitor, be sure not to lower it onto objects in the
pedestal base tray.
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Adjusting the Monitor 9
4. Pivot the
Figure 3-10 Pivoting the Monitor
monitor from landscape to portrait orientation viewing to adapt to your application.
NOTE The monitor pivots from landscape clockwise to portrait orientation.
To view information on the screen in portrait mode, you will need to install the Pivot Pro
software included on the software and documen ta tion CD.
Turning on the Monitor
1. Press the power switch to turn on the computer.
2. Press the power button on the front of the monitor.
CAUTION Burn-in image damage may occur on monitors that display the same static image
on screen for a prolonged period of time.* To avoid burn-in imag
you should always activate a screen saver application or turn o
for a prolonged period of time. Image retention is a condition th
* A prolonged period of time is 12 or more consecutive hours of non-u
Mounting Solutions
Removing the Monitor Pedestal Base
You can remove the monitor panel from the pedestal base to mount the panel on a wall, a swing arm,
or other mounting fixture.
CAUTION Before beginning to disassemble the monitor, be sure the monitor is turned off and
the power and signal cables are both disconnected. If the monitor has a connected audio cable,
disconnect it.
e
damage on the monitor screen,
ff the monitor when it is not in use
at may occur on all LCD screens.
se.
1. Disconnect and remove the signal and power cables from the back of the monitor.
2. Lay the monitor face down on a soft area to preve nt it fro m ge tting scratched , defaced, o r b roken.
10 Chapter 3 Setting Up the Monitor
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3. Remove the four screws (1) that attach the pedestal base to the back of the monitor panel, and lift
the pedestal base off (2).
Figure 3-11 Removing the Monitor from the Pedestal Base
Mounting the Monitor
An optional HP Quick Release can be attached to the monitor panel. It allows you to quickly and securely
attach the monitor panel to the mounting fixture.
1. Remove the monitor panel from the pedestal base. Refer to Removing the Monitor Pedestal
Base steps in the previous section.
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Mounting Solutions 11
2. To mount the monitor to a swing arm, wall or other mounting fixture using the HP Quick Release,
follow the instructions provided in the documentation that comes with Quick Release.
Figure 3-12 Mounting the Monitor to a Swing Arm Using Quick Release
Figure 3-13 Mounting the Monitor to the Wall Using Quick Release
CAUTION The Quick Release is designed to support a maximum of up to 24 lbs. (10.9
kg). If you are mounting to a wall, HP recommends that you consult with a qualified
engineering, architectural, or construction professional to determine the appropriate type
and quantity of mounting fasteners required for the application and to ensure that the
mounting solution is properly installed to support applied loads.
12 Chapter 3 Setting Up the Monitor
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3. If mounting the monitor using another manufacturer’s solution, use the screws (1) previously
removed from the monitor base to mount the display (2) to a swing arm or other mounting fixture.
Consult the documentation included with the moun ting fixture for additional instructions.
CAUTION This monitor supports the VESA industry-standard 100mm mounting holes. To
attach a third-party mounting solution to the monitor, four 4mm, 0.7 pitch, and 10mm long
screws are required (not provided with the monitor). Longer screws should not be used
because they may damage the monitor. It is important to verify that the manufacturer’s
mounting solution is compliant with the VESA standard and is rated to support the weight
of the monitor display panel. For best performance, it is important to use the power and
video cables provided with the monitor.
Figure 3-14 Mounting the Monitor Using a Third-Party Solution
Locating the Rating Labels
The rating labels on the monitor provide the spare part number, product number, and serial number.
You may need these numbers when contacting HP about the monitor model. The rating labels (1) are
located on the rear panel of the monitor display head.
Figure 3-15 Locating the Rating Labels
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Locating the Rating Labels 13
4 Operating the Monitor
Software and Utilities
The CD that comes with the monitor contains files you can install on the computer:
an .INF (Information) file
●
an
.ICM (Image Color Matching) file
●
auto-adjustment pattern utilit y
●
additional software for the monitor model
●
Adobe Reader is supplied on this CD and can be installed from the menu.
NOTE If the monitor does not include a CD, the .INF and .ICM files can be downloaded from
the HP monitors support Web site. See Downloading from the Worldwide Web in this chapter.
The Information File
The .INF file defines monitor resources used by Microsoft Windows operating systems to ensure monitor
compatibility with the computer’s graphics adapter.
This monitor is Microsoft Windows Plug and Play compatible and the monitor will work correctly without
installing the .INF file. Monitor Plug and Play compatibility requires that the computer’s graphic card is
VESA DDC2b-compliant and that the monitor connects directly to the graphics card. Plug and Play does
not work through separate BNC type connectors or through distribution buffers/boxes.
The Image Color Matching File
The .ICM files are data files that are used in conjunction with graphics programs to provide consistent
color matching from monitor screen to printer, or from scanner to monitor screen. Th e .ICM file contains
a monitor color system profile. This file is activated from within graphics programs that support this
feature.
NOTE The ICM color profile is written in accordance with the International Color Consortium
(ICC) Profile Format specification.
14 Chapter 4 Operating the Monitor
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Installing the .INF and .ICM Files
After you determine that you need to update, you can install the .INF and .ICM files from the CD or
download them.
Installing from the CD
To install the .INF and .ICM files on the computer from the CD:
1. Insert the CD in the computer CD-ROM drive. The CD menu is displayed.
2. View the Monitor Driver Software Readme file.
3. Select Install Monitor Driver Software.
4. Follow the on-screen instructions.
5. After the software has been installed, restart Windows.
6. Ensure that the proper resolution and refresh rates appear in the Windows Display control panel.
NOTE You may need to install the digitally signed monitor .INF and .ICM files manually from
the CD in the event of an installation error. Refer to the Monitor Driver Software Readme file on
the CD.
Downloading from the Worldwide Web
To download the latest version of .INF and .ICM files from the HP monitors support Web site:
1. Refer to http://www.hp.com/support and select the country region.
2. Follow the links for the monitor to the support page and download page.
3. Ensure the system meets the requirements.
4. Download the software by following the instructions.
Using the Auto-Adjustment Function
You can optimize the screen performance for the VGA (analog) input by using the Auto Adjust button
on the monitor and the auto-adjustment pattern sof twa re utility on the CD provided.
Do not use this procedure if the monitor is using a DVI input. If th e mon i to r is usin g a VGA (a na log )
input, this procedure can correct the following image quality conditions:
Fuzzy or unclear focus
●
sting, streaking or shadowing effects
Gho
●
Faint vertical bars
●
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Thin, horizontal scrolling lines
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An off-center picture
●
Installing the .INF and
.ICM Files 15
To use the auto-adjustment feature:
1. Allow the monitor to warm up for 20 minutes before adjustin g.
2. Pr
ess the Auto Adjust button on the monitor front panel.
You can also press the Menu button, then select Auto-Adjustment from the OSD Main Menu.
●
Refer to Adjusting the Monitor Settings in this chapter.
If the result is not satisfactory, continue with the procedure.
●
3. Insert the CD in the disc drive. The CD menu is displayed.
4. Select Open Auto-Adjustment Software. The setup test pattern is displayed.
5. Press the Auto Adjust button on the monitor front panel to produce a stable, centered image.
6. Press the ESC key or any other key on the keyboard to exit the test pattern.
16 Chapter 4 Operating the Monitor
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Front Panel Controls
Table 4-1 Monitor Front Panel Controls
Control Function
1 Auto Adjust Activates the auto adjustment feature for optimum image.
2 Menu Opens, selects or exits the OSD menu.
3 − (Minus)
4 + (Plus) If OSD is on, press to navigate forward through the OSD
5 Power
Turns the monitor on or off.
If OSD is on, press to navigate backward through the
●
OSD menu features and decrease adjustment levels.
If OSD is off, press to enable the DVI signal input
●
(available on select models)
●
menu features and increase adjustment levels.
If OSD is off, press to enable the VGA signal input.
●
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Adjusting the Monitor Settings
The monitor settings can be adjusted from the On-Screen Display (OSD) menu o r from th e HP Display
Assistant utility.
Using the On-Screen Display Menu
Use the On-Screen Display (OSD) to adjust the screen image based on your viewing preferences. To
access the OSD, do the following:
1. If the monitor is not already on, press the Power button to turn on the monitor.
2. To access the OSD Menu, press the Menu button on the monitor’s front panel.
3. To navigate through the OSD Menu, press the + (Plus) button on the monitor’s front panel to scroll
up, or the − (Minus) button to scroll in reverse.
4. To select an item from the OSD Menu, use the + or – buttons to scroll to and highlight your sele ction,
then press the Menu button to select that function.
5. Adjust the item using the + or – buttons on the front panel to adjust the scale.
6. After adjusting the function, select Save and Return, or Cancel if you don’t want to save the setti ng,
then select Exit from the Main Menu.
NOTE If the buttons remain untouched for 10 seconds while displaying a menu, new
adjustments will be discarded and the settings will revert to previous settings and exit the menu.
OSD Menu Selections
The following table lists the On-Screen Display (OSD) menu selections and the ir functional descriptions.
After changing an OSD menu item, and if the menu screen has these options, you may choose to:
Cancel—to return to the previous menu level.
●
Save and Return—to save all changes and return to the OSD Main Menu screen . This Save and
●
Return option is only active if you change a menu item.
Reset—to change back to the previous setting.
●
Chap
18
ter 4 Operating the Monitor
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Table 4-2 OSD Menu
Icon Ma in Menu Submenu Description
Brightness Adjusts the brightness level of the screen. The factory default
range is 90.
Contrast Adjustable scale Adjusts the contrast level of the screen. The factory default range
Image Control Adjusts the screen image.
Auto Adju
Horizontal Position Adjusts the position of the screen image left and right.
Vertical Position Adjusts the position of the screen image up and down.
Clock Minimizes any vertical bars or strips visible on the screen
Clock Phase Adjusts the focus of the display. This adjustment allows you to
Color Selects the screen color. The factory default is 6500 K.
9300 K Changes to slightly blueish white.
6500 K Changes to slightly reddish white.
Custom Color Selects and adjusts your own color scales:
stment Automatically adjusts the screen image.
is 80.
background. Adjusting the Clock will also change the horizontal
screen image.
remove any horizontal noise and clear or sharpen the image of
characters.
R—sets your own red color levels
●
G—sets your own gr
●
B—sets your own blue color levels
●
sRGB Sets
Language Selects the language in which the OSD menu is displayed. The
Management Selects the power management features of the monitor.
Power Saver Enables the power saving feature. Select:
Power On Recall Restores power to the monitor following an unexpected removal
your screen
image technology industry.
factory default is English.
On
●
Off
●
factory default is On.
The
of power. Select:
On
●
Off
●
colors to adapt to the color standa
een color levels
rds used in the
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Adjusting the Monitor Settings 19
Table 4-2 OSD Menu (continued)
Icon Main Menu Submenu Description
The factory default is On.
Mode Display Displays the resolution, refresh rate and frequency information on
the screen each time the OSD Main Menu is accessed. Select:
On
●
f
Of
●
The f
actory default is Off.
Power-On Status
Display
DDC/CI Support Allows the computer to control some OSD menu features such as
Sleep Timer Provides the timer adjustment menu options:
Displays the operating status of the monitor each time the monitor
is powered on. Select the location to display the status to:
Top
●
Mid
dle
●
Bottom
●
Off
●
actory default is Top.
The f
brightness, contrast and color temperature. Set to:
On
●
Of
f
●
The factory defa
Set Current Time—sets the current time in hours and minutes
●
S
et Sleep Time—sets the time you want to place the monitor
●
in sleep mode
Set on Time—sets the time you want the monitor to wake up
●
from sleep mode
ult is On.
OSD Control Adjusts the position of the OSD menu on the screen.
Information Selects and displays important information about the monitor.
20 Chapter 4 Operating the Monitor
Timer—sets the Sleep Timer feature On or Off. The default
●
setting is Off
Sleep Now—immediately sets the monitor to enter sleep
●
mode
Horizontal Position Changes the viewing position of the OSD menu to the left or right
area of the screen. The factory default range is 50.
Vertical Position Changes the viewing position of the OSD menu to the top or
OSD Timeout Sets the time duration in seconds that the OSD is visible after the
bottom area of the screen. The factory default range is 50.
last button is pressed. The factory default is 30 seconds.
Provides the current input video mode. Current Settings
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Table 4-2 OSD Menu (continued)
Icon Ma in Menu Submenu Description
Recommended Settings Provides the recommended resolution mode and refresh rate for
the monitor.
Serial Number Reports the serial number of the monitor. The serial number is
needed if contacting HP technical support.
Backlight hours Reports the total hours of backlight operation.
Factory Reset Returns all OSD menu settings to the factory default setting,
except the Language setting.
Exit Exits the OSD menu screen.
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Adjusting the Monitor Settings 21
Optimizing Digital Conversion
This monitor contains advanced circuitry that allows the flat panel screen to function like a standard
monitor. Two controls in the on-screen display can be adjusted to improve image performance: Clock
and Clock Phase.
NOTE The Clock and Clock Phase controls are adjustable only when using an analog input.
These controls are not adjustable for digital inputs.
The Clock must first be set correctly since the Clock Phase settings are dependent on the main
Clock setting. Use these controls only when the auto-adjustment function does not provide a
satisfactory image.
Clock—Increases/decreases the value to minimize any vertical bars or stripes visible on the scree n
●
background.
Clock Phase—Increases/decreases the value to minimize video distortion or video jitter.
●
NOTE When using the controls, you will obtain the best results by using the auto-adjustment
pattern software utility provided on the CD.
When adjusting the Clock and Clock Phase values, if the monitor images become distorted,
continue adjusting the values until the distortion disappears. To restore the factory settings, select
Yes from the Factory Reset menu in the on-screen display.
Using the HP Display Assistant Utility
HP Display Assistant, included on the software and documentation CD, is a software utility that guides
you through the tuning process with easy to understand instructions and ba ckground patterns designed
for each monitor control. It provides:
Accurate screen calibration through the use of step-by-step instruction Wizards to obtain the best
●
overall image quality
Software control of the monitor image and color settings to eliminate depend ence on the monitor’s
●
front panel buttons and On-Screen Display (OSD) menu
Defined preset display settings for each individual user in a multi-user environment
●
Multiple preset display settings for a single user based on content and ambient lighting
●
Asset Management and Power Management capabilities that include remote control for individual
●
or a group of displays on the domain from a centralized console application
The HP Display Assistant Utility has two modes of operation: Wizard and OSD mode. The preferred
method of use is Wizard mode, which takes you through a step -by-step process to accurately calib rate
the monitor. This method relies on a sequence of steps that will obtain the best display results when
completed.
NOTE Refer to the HP Display Assistant user guide for additional information about the
software.
22 Chap
ter 4 Operating the Monitor
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Identifying Monitor Conditions
Special messages will appear on the monitor screen when identifying the following monitor conditions:
Input Signal Out of Range—Change resolution setting to 1680 × 1050 – 75Hz—Ind
●
monitor does not support the input signal because the resolution and/or refresh rate are set higher
than the monitor supports
No Input Signal—Indicates the monitor is not receiving a video signal from the PC on the monitor
●
video input connector. Check to determine if the PC or input signal source is off or in the power
saving mode.
Multiple Inputs are Active—Use the OSD to select the desired video input—Indicates the
●
monitor is connected to two video inputs. The monitor is trying to display both inputs, but after 10
seconds the monitor uses the default signal input.
Auto Adjustment is in Progress—Indicates the auto-adjustment function is active
●
Monitor Going to Sleep—Indicates the screen display is entering a sleep mode
●
Check Video Cable—Indicates the video cable is not properly connected to the computer
●
OSD Lock—The OSD can be enabled or disabled by pressing and holding the Menu button on
●
the front panel for 10 seconds. If the OSD is locked, the wa rn ing message OSD Lock-Out is
displayed for ten seconds.
If the OSD is locked, press and hold the Menu button f
●
If the OSD is unlocked, press and hold the Menu button for 10 seconds to lock the OSD.
●
or 10 seconds to unlock the OSD.
icates the
Sleep Timer Mode
The Sleep Timer mode is an energy-saving feature that enables you to set a time for the monitor to
power on and off at the same time every day. This also extends the life of the backlight bulbs in the
monitor. The Sleep Timer has five settings:
Set Current Time
●
Set Sleep Time
●
Set On Time
●
Time
●
●
To set the timer:
1. Press the Menu button on the monitor front panel to display the Advanced Menu.
2. Scroll down and highlight Management.
3. Press the Menu button to select Management.
4. Scroll down and highlight and select Sleep Timer > Set Current Time.
r: On/Off
Sleep Now
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Identi
fying Monitor Conditions 23
NOTE You must set the current local time before you reset the time for Sleep Time or On
Time. Note that the time is displayed in a 24–hour clock format. For example, 1:15 p.m. is
displayed as 13 hours 15 minutes.
5. Press the Menu button once to enter the adjustment mode for hours.
6. Press the − (Minus) or + (Plus) button to adjust the hour.
7. Press the Menu button again to enter the time for minutes.
8. Press the − (Minus) or + (Plus) button to adjust the minutes.
9. Press the Menu button to lock in the time chosen.
Afte
10.
11. If
r setting the current time, the highlight automatically skips to Set Sleep Time hours. Repeat
steps 6 through 9 to set Sleep Time.
you do not want to set Sleep Time, press the Menu button twice, then select Save and
Return to exit the menu.
12. Af
13. Set t
14. W
The fifth selection, Sleep Now, turns the monitor backlights off immediately and stays in sleep mode
until the next On Time activates or a monitor button is pressed.
ter setting Sleep Time, the highlight automatically skips to Set On Time hours. Repeat steps 6
through 9 to set On Time.
he Timer mode to On to activate the Sleep Timer settings.
hen you are finished, select Save and Return to exit the menu.
HP Display LiteSaver
HP Display LiteSaver is a software application, available on the CD, that increases monitor life and
saves energy. It allows you to place the monitor into its low power sleep mode at predefined times by
shutting down or reducing power to most internal circuits. This helps protect the LCD panel against
image retention. Image retention can occur when the monitor is left on while displaying the same image
for an extended period of time, leaving a shadow of the image on the screen.
Installing the HP Display LiteSaver Software
1. Insert the CD in the computer CD-ROM Drive. The CD menu is displayed .
2. Select Install HP Display LiteSaver Software.
3. After installing the software, click the HP Display LiteSaver icon in the Windows system tray or
right-click the icon and select Configure from the pop-up menu.
4. Select the following options to configure the HP Display LiteSaver features:
Table 4-3 HP Display LiteSaver Configuration Options
Select This Option To Do This
Enable Display LiteSaver Enables the HP Display LiteSaver functions; deselect to disable the HP Display
24 Chapter 4 Operating the Monitor
LiteSaver
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Table 4-3 HP Display LiteSaver Configuration Options (continued)
Select This Option To Do This
Display Off Sets the time when the monitor automatically turns off. This does not affect screen
saver operation, which has priority over the HP Display LiteSaver.
Display On Sets the time when the monitor automatically turns on. This does not affect screen
saver operation, which has priority over the HP Display LiteSaver.
Activity Extension Sets the time in minutes before the monitor turns off if there is any keyboard or mouse
activity after the Display Off time is reached. If the keyboard or mouse is used, then
HP Display LiteSaver waits until the set amount of time before turning the display
off again. Set to 0 to disable. If disabled, the monitor will turn off as soon as the
Display Off time is reached, regardless of keyboard or mouse activity.
Show 1 minute Display Off Notice Displays a popup message in the system tray 1 minute before the monitor is turned
off by HP Display LiteSaver
Status Shows the time until the monitor is next due to be turned off by HP Display LiteSaver
OK
Cancel
Help
Exit
View HP Display LiteSaver Readme on the CD for additional information on how to configure HP Display
LiteSaver.
sRGB Support
The monitor is designed to support sRGB for color management, which adapts to the color standards
used in the image technology industr y.
To take advantage of the sRGB support, you need to change the monitor’s co lor temp erature to sRG B
and install the sRGB color profile (ICM) file.
NOTE The sRGB color temperature preset improves the color accuracy of sRGB images on
the computer monitor, but some color variation may still occur.
Stores the current settings and minimizes HP Display LiteSaver to the System Tray
Restores the previous settings and minimizes HP Display LiteSaver to the System
Tray. HP Display LiteSaver will continue to run.
Opens the online help file
Exits and closes the HP Display LiteSaver. It will no longer control the monitor power
until it is next run.
Changing the Color Temperature
1. Press the Menu button on the front panel of the monitor to launch the Main Menu of the OSD.
2. Select Advanced Menu to access all options in the Main Menu.
3. Select Color to display the Color Temperature menu.
4. Select sRGB.
5. Select Save and Return to exit the menu.
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sRGB Support 25
Installing the sRGB ICM File for Microsoft Windows 2000 and Windows XP
NOTE To complete the following procedure, you must be logged in as an administrator or a
member of the administrator’s group. If the computer is connected to a network, network policy
settings may prevent you from completing this procedure. The sRGB ICM file does not support
Windows 95 and Windows NT operating systems.
1. Click the Display icon in the Control Panel.
2. In the Display Properties windows, select the Settings tab, then click the Advanced button.
3. Select the Color Management tab, then click the Add button to open the Add Profile
Association dialog box.
4. Select the sRGB Color Space Profile.icm f ile, then click the Add button
5. To activate a color profile for the monitor, you must set it as the Default Monitor Profile. Select
sRGB Color Space Profile, then click Set as Default button.
6. Click Apply or OK.
26 Chap
ter 4 Operating the Monitor
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A Troubleshooting
Solving Common Problems
The following table lists possible problems, the possible cause of each problem, and the reco mmended
solutions.
Problem Possible Cause Solution
Screen is blank. Power cord is disconnected. Connect the power cord.
Power switch on front panel of the
monitor is turned off.
Master power switch on rear panel
of the monitor is turned Off.
Video cable is improperly
connected.
Screen blanking is active. Press any key on the keyboard or move the mouse to
Image appears blurred,
indistinct, or too dark.
Image is not centered Position may need adjustment. Press the Menu button to access the OSD menu. Select
Check Video Cable is
displayed on screen.
Out of Range. Set Monitor
to 1280 × 1024 @ 60Hz is
displayed on screen.
Brightness and contrast are too low. Press the −(Minus) button on the front panel. If this does
Monitor video cable is
disconnected.
Video resolution and/or refresh rate
are set higher than what the monitor
supports.
Press the front panel power button.
Turn the master power switch to On.
Connect the video cable properly. Refer to Chapter 3,
Setting Up the Monitor for more information.
inactivate the screen blanking utility.
not correct the image, press the Menu button to open the
Basic OSD Menu, and adjust the brightness and contrast
scales as needed.
Image Control/Horizontal Position or Vertical Position to
adjust the horizontal or vertical position of the image.
Connect the DVI-D signal cable to the DVI-D connector on
the computer, or the VGA signal cable to the VGA
connector on the computer. Be sure that the computer
power is off while connecting the video cable.
Restart the computer and enter Safe Mode. Change the
settings to a supported setting (see Table B-2 L1940T
Model Factory Preset Modes ). Restart the computer so
that the new settings take effect.
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HP Display LiteSaver
doesn't 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 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.
Solving Common Problems 27
Problem Possible Cause Solution
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.
The monitor is off but it did The monitor's power saving control Check the monitor's OSD menu setting for power saving
not seem to enter into a low- is disabled. enable/disable controls. The control should be set to
power sleep mode. enable to allow the monitor to enter into low-power modes.
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
Confirm that the HP Display LiteSaver is compatible with
the system.
1. Right-click on the HP Display LiteSaver
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.
icon in the
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
●
28 Appendix A Troubleshooting
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B Technical Specifications
NOTE All performance specifications are provided by the component manufacturers.
Performance specifications represent the highest specification of all HP's component
manufacturers' typical level specifications for performance and actual performance may vary
either higher or lower.
L1940T 19” LCD Monitor
Table B-1 L1940T Specifications
Display 19.0 inches 48.3 cm
Type TFT LCD
Viewable Image Size 19–inch diagonal 48.3 cm
Tilt −5 to 35°
Swivel −90 to 90°
Maximum Weight (Unpacked) 18.5 lbs. 8.4 kg
Dimensions (include pedestal base)
Height
epth
D
Width
Maximum Graphic Resolution 1280 × 1024 (75 Hz) analog and digital modes
Text Mode 720 × 400
Dot Pitch 0.264 (H) × 0.264 (W) mm
Horizontal Frequency 30 to 83 kHz
Vertical Refresh Rate (analog mode) 56 to 76 Hz
Environmental Requirements Temperature
Operating Temperature
Storage Temperature
Relative Humidity 20 to 80%
18.8 inches 477 mm
10.4 inches 265 mm
16.3 inches 413 mm
41 to 95° F
−4 to 140° F
5 to 35° C
−20 to +60° C
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Power Source 100 — 240 VAC, 50/60 Hz
L1940T 19” LCD Monitor 29
Table B-1 L1940T Specifications (con tinue d)
Altitude:
Operating
Storage
Power Consumption (maximum)
Input Terminals
0 to 12,000 feet 0 to 3657.6 m
0 to 40,000 feet 0 to 12192 m
<70 watts
15–pin D-type connector with cable included. DVI-
D connector with DVI-D cable not included
(available on select models)
One VGA connector with cable included.
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.
Table B-2 L1940T Model Factory Preset Modes
Preset Pixel Format Horz Freq Horz Polarity Vert Freq Vert Polarity Pixel Clk Source
(kHz) (Hz) (MHz)
1 640 × 480 31.469 − 59.940 − 25.175 VGA
2 640 × 480 37.861 − 72.809 − 31.500 VESA
3 640 × 480 37.500 − 75.000 − 31.500 VESA
4 720 × 400 31.469 − 70.087 + 28.322 VGA
5 800 × 600 37.879 + 60.317 + 40.000 VESA
6 800 × 600 48.077 + 72.188 + 50.000 VESA
7 800 x 600 46.875 + 75.000 + 49.500 VESA
8 832 x 624 49.726 ± 74.551 ± 57.284 Mac
9 1024 × 768 48.363 − 60.004 − 65.000 VESA
10 1024 × 768 56.476 − 70.069 − 75.000 VESA
11 1024 x 768 60.023 + 75.029 + 78.750 VESA
12 1152 x 870 68.680 − 75.060 − 100.000 Mac
13 1152 x 900 71.710 − 76.050 − 105.561 Sun
14 1280 × 1024 63.980 + 60.020 + 108.000 VESA
15 1280 x 1024 79.970 + 75.020 + 135.000 VESA
30 Appendix B Technical Specifications
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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 or HP Display Assistant software. Your changes can be made to any or a ll of these mod es 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 15 factory present modes for the L1940T model, 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 70 watts of po wer and the
Power light is green.
The monitor also supports a reduced power stat e. T he re du ce d p ow er st ate 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 monitor's Energy Saver utility, you can also program the monitor to enter
into the reduced power state at a predetermined time. When the monitor's Energy Saver utility causes
the monitor to enter the reduced power state, the power light blinks amber.
ENWW
Entering User Modes 31
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 e qui pme nt ge n erate s, 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, th ere 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 user's 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:
32 Appendix C Agency Regulatory No tice s
ENWW
Hewlett Packard Company
P. O. Box 692000, Mail Stop 530113
Houston
O
or questions regarding this FCC declaration, contact:
F
Hewlett Packard Company
P. O. Box 692000, Mail Stop 510101
Houston, Texas 77269-2000
Or, call (281) 514-3333
To identify this product, refer to the Part, Series, or Model number found on the product.
, Texas 77269-2000
r, call 1-800-HP-INVENT (1-800 474-6836)
Canadian Notice
This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment
Regulations.
Avis Canadien
Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel
brouilleur du Canada.
European Union Regulatory Notice
This product complies with the following EU Directives:
Low Voltage Directive 73/23/EEC
●
Directive 89/336/EEC
EMC
●
Compliance with these directives imp
(European Norms) which are listed on the EU Declaration of Conformity issued by Hewlett-Packard for
this product or product family.
This compliance is indicated by the following conformity marking pla ced o n th e product:
This marking is valid for non-Telecom This marking is valid for EU nonproducts and EU harmonized Telecom harmonized Telecom products.
products (e.g. Bluetooth)
lies conformity to applicable harmonized European standards
*Notified body number (used only if
applicable — refer to the product label).
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Canadian Notice 33
Hewlett-Packard GmbH, HQ-TRE, Herrenberger Strasse 140, 71034 Boeblingen, Germany
German Ergonomics Notice
HP products which bear the “GS” approval mark, when forming part of a system comprising HP brand
computers, keyboards and monitors that bear t he “GS” approval mark, meet the applicable ergonomic
requirements. The installation guides included with the products provide configuration information.
Japanese Notice
Korean Notice
Power Cord Set Requirements
The monitor power supply is provided with Automatic Line Switching (ALS). This feature allows the
monitor to operate on input voltages between 100–120V or 200–240V.
The power cord set (flexible cord or wall plug) received with the moni tor meets the requirements for us e
in the country where you purchased t he e qu i pme nt.
If you need to obtain a power cord for a different country, you should purchase a power cord that is
approved for use in that country.
The power cord must be rated for the product and for the voltage and current marked on the product's
electrical ratings label. The voltage and current rating of the cord should b e greater than the voltage and
current rating marked on the product. In a ddition, the cross-sectional area of the wire must be a minimum
of 0.75 mm² or 18 AWG, and the length of the cord must be between 6 feet (1.8 m) and 12 feet (3.6 m).
If you have questions about the type of power cord to use, contact an authorized HP service provider.
A power cord should be routed so that it is not likely to be walked on or pinched by items placed upon
it or against it. Particular attention should be paid to the plug, electrical outlet, and the point where the
cord exits from the product.
Japanese Power Cord Requirements
For use in Japan, use only the power cord received with this product.
34 Appendix C Agency Regulatory Notices
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CAUTION Do not use the power cord received with this product on any other products.
Product Environmental Notices
Materials Disposal
This HP product contains mercury in the fluorescent lamp in the display LCD that might require special
handling at end-of-life.
Disposal of this material can be regulated because of environmental considerations. For disposal or
recycling information, contact the local authorities or the Electronic Industries Alliance (EIA)
http://www.eiae.org.
Disposal of Waste Equipment by Users in Private Household in the European Union
This symbol on the product or on its packaging indicates that this product must not be disposed of with
your household waste. Instead, it is your responsibility to dispose of your waste equipment by handing
it over to a designated collection point for the recycling or waste electrical and electronic equipment.
The separate collection and recycling of the waste equipment at the time of disposal will help to conserve
natural resources and ensure that it is recycled in a manner that protects human health and the
environment. For more information about where you can drop off your waste equipment for recycling,
please contact the local city office, the household waste disp o sal se rvice or th e shop where you
purchased the product.
Restriction of Hazardous Substances (RoHS)
A Japanese regulatory requirement, defined by specification JIS C 0950, 2005, mandates that
manufacturers provide Material Content Declarations for certain categories of electronic products
offered for sale after July 1, 2006. To view the JIS C 0950 material declaration for this product, visit
http://www.hp.com/go/jisc0950.
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Product Environmental Notices 35
D LCD Monitor Quality and Pixel Policy
The TFT monitor uses high-precision technology, manufactured according to HP standards, to
guarantee trouble-free perfo rman ce. Nevertheless, the display may have cosmetic imperfections that
appear as small bright or dark spots. This is common to all LCD displays used in products supplied by
all vendors and is not specific to the HP LCD. Th ese imperfections are caused by one or more defective
pixels or sub-pixels.
A pixel consists of one red, one green, and one blue sub-pixel.
●
A defective whole pixel is always turned on (a bright spot on a dark background), or it is always off
●
(a dark spot on a bright background). The first is the more visible of the two.
A defective sub-pixel (dot defect) is less visible than a defective whole pixel and is small and only
●
visible on a specific background.
The HP display does not have more than:
3 bright dots.
●
5 dark dots.
●
5 total bright and dark dots.
●
No more than two adjacent (less than 2.5 mm edge-to-edge) defective pixels.
●
To locate defective pixels, the monitor should be viewed under normal operating conditions, in normal
operating mode at a supported resolution and refresh rate, from a distance of approximately 50 cm (20
in).
HP expects that, over time, the industry will continue to improve its ability to produce LCDs with fewer
cosmetic imperfections and HP will adjust guidelines as improvements are made.
36 Ap
pendix D LCD Monitor Quality and Pixel Policy
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