Changes may be made periodically to the information in this publication without obligation
to notify any person of such revisions or changes. Such changes will be incorporated in new
editions of this manual or supplementary documents and publications. This company makes
no representations or warranties, either expressed or implied, with respect to the contents
hereof and specifically disclaims the implied warranties of merchantability or fitness for a
particular purpose.
Record the model number, serial number, purchase date and place of purchase information in
the space provided below. The serial number and model number are recorded on the label
affixed to your computer. All correspondence concerning your unit should include the serial
number, model number and purchase information.
No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in
any form or by any means, electronically, mechanically, by photocopy, recording or otherwise,
without the prior written permission of Acer Incorporated.
Model number: __________________________________
Serial number: ___________________________________
Date of purchase: ________________________________
Place of purchase: ________________________________
Copyright © 2013 . Acer Incorporated.
All Rights Reserved.
Acer LCD Monitor User's Guide
Original Issue: 01/20
Acer LCD Monitor User's Guide
Acer and the Acer logo are registered trademarks of Acer Incorporated. Other companies'
product names or trademarks are used herein for identification purposes only and belong to
their respective companies.
13
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iii
Special notes on LCD monitors
The following are normal with the LCD monitor and do not indicate a problem.
•
Due to the nature of the fluorescent light, the screen may flicker during
initial use. Turn off the power switch and then turn it on again to make
sure the flicker disappears.
•
You may find slightly uneven brightness on the screen depending on the
desktop pattern you use.
•
The LCD screen has 99.99% or more effective pixels. It may include
blemishes of 0.01% or less such as a missing pixel or a pixel lit all the time.
•
Due to the nature of the LCD screen, an afterimage of the previous screen
may remain after switching the image, when the same image is displayed
for hours. In this case, the screen is recovered slowly by changing the image
or turning off the power switch for a few hours.
Information for your safety and
comfort
Safety instructions
Read these instructions carefully. Keep this document for future reference.
Follow all warnings and instructions marked on the product.
Cleaning your monitor
Please carefully follow these guidelines when cleaning the monitor:
•
Always unplug the monitor before cleaning.
•
Use a soft cloth to wipe the screen and cabinet front and sides.
Connecting/disconnecting the device
Observe the following guidelines when connecting and disconnecting power
from the LCD monitor:
•
Make sure the monitor is attached to its base before connecting the power
cord to the AC power outlet.
•
Make sure both the LCD monitor and the computer are turned off before
connecting any cable or unplugging the power cord.
•
If the system has multiple sources of power, disconnect power from the
system by unplugging all power cords from the power supplies.
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iv
Accessibility
Be sure that the power outlet you plug the power cord into is easily accessible
and located as close to the equipment operator as possible. When you need to
disconnect power from the equipment, be sure to unplug the power cord from
the electrical outlet.
Safe listening
To protect your hearing, follow these instructions.
•
Gradually increase the volume until you can hear it clearly and comfortably
and without distortion.
•
After setting the volume level, do not increase it after your ears have
adjusted.
•
Limit the amount of time listening to music at high volume.
•
Avoid turning up the volume to block out noisy surroundings.
•
Turn the volume down if you can't hear people speaking near you.
Warnings
•
Do not use this product near water.
•
Do not place this product on an unstable cart, stand or table. If the product
falls, it could be seriously damaged.
•
Slots and openings are provided for ventilation to ensure reliable
operation of the product and to protect it from overheating. These
openings must not be blocked or covered. The openings should never be
blocked by placing the product on a bed, sofa, rug or other similar surface.
This product should never be placed near or over a radiator or heat
register, or in a built-in installation unless proper ventilation is provided.
•
Never push objects of any kind into this product through cabinet slots as
they may touch dangerous voltage points or short-out parts that could
result in a fire or electric shock. Never spill liquid of any kind onto or into
the product.
•
To avoid damage of internal components and to prevent battery leakage,
do not place the product on a vibrating surface.
•
Never use it under sporting, exercising, or any vibrating environment
which will probably cause unexpected short current or damage internal
devices.
Using electrical power
•
This product should be operated from the type of power indicated on the
marking label. If you are not sure of the type of power available, consult
your dealer or local power company.
•
Do not allow anything to rest on the power cord. Do not locate this
product where people will walk on the cord.
•
If an extension cord is used with this product, make sure that the total
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v
ampere rating of the equipment plugged into the extension cord does not
exceed the extension cord ampere rating. Also, make sure that the total
rating of all products plugged into the wall outlet does not exceed the fuse
rating.
•
Do not overload a power outlet, strip or receptacle by plugging in too
many devices. The overall system load must not exceed 80% of the branch
circuit rating. If power strips are used, the load should not exceed 80% of
the power strip's input rating.
•
This product's power cord is equipped with a three-wire grounded plug.
The plug only fits in a grounded power outlet. Make sure the power outlet
is properly grounded before inserting the power cord plug. Do not insert
the plug into a non-grounded power outlet. Contact your electrician for
details.
Warning! The grounding pin is a safety feature. Using a power
outlet that is not properly grounded may result in electric shock
and/or injury.
Note: The grounding pin also provides good protection from
unexpected noise produced by other nearby electrical devices that
may interfere with the performance of this product.
•
Use the product only with the supplied power supply cord set. If you need
to replace the power cord set, make sure that the new power cord meets
the following requirements: detachable type, UL listed/CSA certified, type
SPT-2, rated 7 A 125 V minimum, VDE approved or its equivalent, 4.5
meters (15 feet) maximum length.
Product servicing
Do not attempt to service this product yourself, as opening or removing covers
may expose you to dangerous voltage points or other risks. Refer all servicing to
qualified service personnel.
Unplug this product from the wall outlet and refer servicing to qualified service
personnel when:
•
the power cord or plug is damaged, cut or frayed
• liquid was spilled into the product
•
the product was exposed to rain or water
•
the product has been dropped or the case has been damaged
•
the product exhibits a distinct change in performance, indicating a need
for service
•
the product does not operate normally after following the operating
instructions
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vi
Note: Adjust only those controls that are covered by the operating
instructions, since improper adjustment of other controls may
result in damage and will often require extensive work by a
qualified technician to restore the product to normal condition.
Potentially explosive environments
Switch off your device in any area with a potentially explosive atmosphere and
obey all signs and instructions. Potentially explosive atmospheres include areas
where you would normally be advised to turn off your vehicle engine. Sparks in
such areas could cause an explosion or fire resulting in bodily injury or even
death. Switch off the device near gas pumps at service stations. Observe
restrictions on the use of radio equipment in fuel depots, storage and
distribution areas; chemical plants; or where blasting operations are in progress.
Areas with a potentially explosive atmosphere are often, but not always,
marked. They include below deck on boats, chemical transfer or storage
facilities, vehicles using liquefied petroleum gas (such as propane or butane),
and areas where the air contains chemicals or particles such as grain, dust or
metal powders.
Additional safety information
Your device and its enhancements may contain small parts. Keep them out of
the reach of small children.
IT Equipment Recycling Information
Acer is strongly committed to environmental protection and views recycling, in
the form of salvaging and disposal of used equipment, as one of the company's
top priorities in minimizing the burden placed on the environment.
We at Acer are very conscious of the environmental effects of our business and
strive to identify and provide the best working procedures to reduce the
environmental impact of our products.
For more information and help when recycling, please go to this website:
Visit www.
.com
for further information on the features and benefits
of our other products.
http://www.acer-group.com/public/Sustainability
acer-group
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vii
Disposal instructions
Do not throw this electronic device into the trash when discarding.
To minimize pollution and ensure utmost protection of the global environment,
please recycle. For more information on the Waste from Electrical and
Electronics Equipment (WEEE) regulations, visit
LCD pixel statement
The LCD unit is produced with high-precision manufacturing techniques.
Nevertheless, some pixels may occasionally misfire or appear as black or
red dots. This has no effect on the recorded image and does not constitute
a malfunction.
http://www.acer‐group.com/public/Sustainability
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viii
This p
roduct has been shipped enabled for power management:
•
Activate display
’s Sleep mode within 15 minutes of user inactivity.
•
Activate com
puter’s Sleep mode within 30 minutes of user inactivity.
•
Wake th
e computer from Sleep mode by pushing the power button.
T
ips and information for comfortable use
Co
mputer users may complain of eyestrain and headaches after prolonged use.
Users are also at risk of physical injury after long hours of working in front of a
computer. Long work periods, bad posture, poor work habits, stress,
inadequate working conditions, personal health and other factors greatly
increase the risk of physical injury.
Incorrect computer usage may lead to carpal tunnel syndrome, tendonitis,
tenosynovitis or other musculoskeletal disorders. The following symptoms may
appear in the hands, wrists, arms, shoulders, neck or back:
•
nu
mbness, or a burning or tingling sensation
•
achi
ng, soreness or tenderness
•
pain
, swelling or throbbing
•
st
iffness or tightness
•
cold
ness or weakness
If you have these symptoms, or any other recurring or persistent discomfort
and/or pain related to computer use, consult a physician immediately and
inform your company's health and safety department.
The following section provides tips for more comfortable computer use.
Finding your comfor
t zone
Fin
d your comfort zone by adjusting the viewing angle of the monitor, using a
footrest, or raising your sitting height to achieve maximum comfort. Observe
the following tips:
•
refr
ain from staying too long in one fixed posture
•
av
oid slouching forward and/or leaning backward
• st
and up and walk around regularly
to remove the strain on your leg
mu
scles
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ix
T
aking care of your vision
Lo
ng viewing hours, wearing incorrect glasses or contact lenses, glare, excessive
room lighting, poorly focused screens, very small typefaces and low-contrast
displays could stress your eyes. The following sections provide suggestions on
how to reduce eyestrain.
Eyes
•
Rest your
eyes frequently.
• Give yo
ur eyes regular breaks by looking away from the monitor and
focusing on a distant point.
•
Blin
k frequently to keep your eyes from drying out.
Display
•
Keep you
r display clean.
•
Keep you
r head at a higher level than the top edge of the display so
your
eyes
point downward when looking at the middle of the disp
lay.
•
Adju
st the display brightness and/or
contrast to a comfortable level for
enh
anced text readability and graphics clarity.
•
Elimi
nate glare and reflections by:
•
plac
ing your display
in such a way that the side faces the window or
any lig
ht source
•
min
imizing room light by using drapes, shades or blinds
•
usin
g a task light
•
cha
nging the display's viewing angle
•
usin
g a glare-reduction filter
•
usin
g a display visor, such as a piece of cardboard extended from th
e
display
's top front edge
•
Avoid
adjusting your display to an awkward viewing angle.
•
Av
oid looking at bright light sources, such as open windows, for extended
periods of time.
Develop
ing good work habits
Develop
the following work habits to make your computer use more relaxing
and productive:
•
Take sh
ort breaks regularly and often.
•
Perform some stretching exercises.
• Breathe fr
esh air as often as possible.
•
Exer
cise regularly and maintain a healthy body.
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Acer Incorporated
8F, 88, Sec. 1, Xintai 5th Rd., Xizhi
New Taipei City 221, Taiwan
Declaration of Conformity
We,
Acer Incorporated
8F, 88, Sec. 1, Xintai 5th Rd., Xizhi, New Taipei City 221, Taiwan
Contact Person: Mr. RU Jan, e-mail:[email protected]
And,
Acer Italy s.r.l
Via Lepetit, 40, 20020 Lainate (MI) Italy
Tel: +39-02-939-921 ,Fax: +39-02 9399-2913
www.acer.it
Declare under our own responsibility that the product:
Product:
Trade Name:
Model Number:
SKU Number:
LCD Monitor
Acer
K27 2HUL
K27 2HULxxxxxx;
(“x” = 0~9, a ~ z, A ~ Z, or blank)
To which this declaration refers conforms to the relevant standard or other standardizing documents:
EN 55022:2006/A1:2007 Class B; EN 55024:2010
EN61000-3-3:2008
EN 60950-1:2006/A11:2009/A1:2010 +A12:2011
EN50581:2012
We hereby declare above product is in compliance with the essential requirements and other relevant
provisions of EMC Directive 2004/108/EC, Low Voltage Directive 2006/95/EC, and RoHS Directive
2011/65/EU and Directive 2009/125/EC with regard to establishing a framework for the setting of ecodesign
requirements for energy-related product.
Year to begin affixing CE marking 2013.
_______________________________
RU Jan / Sr. Manager Date
Regulation, Acer Inc.
Feb.17 , 2013
EN 61000-3-2:2006+A1:2009+A2:2009, Class D
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Acer America Corporation
333 West San Carlos St., Suite 1500
San Jose, CA 95110, U. S. A.
Tel : 254-298-4000
Fax : 254-298-4147
www.acer.com
Federal Communications Commission
Declaration of Conformity
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, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
The following local Manufacturer /Importer is responsible for this declaration:
Product: LCD Monitor
Model Number:
SKU Number:
K272HUL
K272HUL xxxxxx ;
(“x” = 0~9, a ~ z, A ~ Z or Blank)
Name of Responsible Party: Acer America Corporation
Address of Responsible Party: 333 West San Carlos St.
Suite 1500
San Jose, CA 95110
U. S. A.
Contact Person: Acer Representative
Phone No.: 254-298-4000
Fax No.: 254-298-4147
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1
Special notes on LCD monitors iii
Information for your safety and comfort iii
Safety instructions iii
Cleaning your monitor iii
Connecting/disconnecting the device iii
Accessibility iv
Safe listening iv
Warnings iv
Using electrical power iv
Product servicing v
Additional safety information vi
IT equipment recycling information vi
Disposal instructions vii
LCD pixel statement vii
Tips and information for comfortable use viii
Federal Communications Commission
Declaration of Conformity xi
Unpacking 1
Attaching/removing the base 2
Screen position adjustment 2
Connecting the power cord 5
Power saving
Display Data Channel (DDC)
Connector pin assignment
Standard timing table
Installation
User controls
How to adjust a setting
Acer eColor Management 12
User 13
Troubleshooting 15
15
DVI mode 16
5
5
6
8
9
10
11
DP mode
16
HDMI mode
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1
English
Unpacking
Please check that the following items are present when you unpack the box,
and save the packing materials in case you need to ship or transport the
monitor in the future.
LCD monitor Quick start guide
DVI cable (Option)
AC power cord
Audio Cable (Option)
(Option)
DP cable
HDMI Cable
(Optional)
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English
2
Remove: Reverse the steps to remove the base.
Screen position adjustment
To optimize the viewing position, you can adjust the monitor tilt by using
both of your hands to hold the edges of the monitor as shown below.
The monitor can be adjusted to 25 degrees up or 5 degrees down.
Attaching
the Base
--------------------------------------------------------------------
Note: Remove the monitor and monitor base from its packaging.
Carefully place the monitor face-down on a stable surface -- use a
cloth to avoid scratching the screen.
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5
English
Connecting the power cord
• Check first to make sure that the power cord you use is the correct type
requir
ed for your area.
• The monitor has a universal power supply that allows operation in either
100/120 V A
C or 220/240 V AC voltage area. No user-adjustm
ent is
requir
ed.
• Plug one end of the power cord to the AC inlet, and plug the other end
into an AC outlet.
• For units using 120 V AC:
Use a UL-listed cord set, type SVT wire and plug rated 10 A/125 V.
• For units using 220/240 V AC:
Use a cord set consisting of H05VV-F cord and plug rated 10 A/250 V. Th
e
cord set
should have the appropriate safety approvals for the countr
y in
which
the equipment will be installed.
Power saving
The monitor will be switched to "power saving" mode by the control signal
from the display controller, as indicated by the amber-colored power LED.
The power saving mode will be kept until a control signal has been detected or
the keyboard or mouse is activated. The recovery time from "power saving"
mode back to "on" is around 3 seconds.
Display Data Channel (DDC)
To make installation easier, so long as your system supports the DDC protocol,
the monitor is able to plug-and-play. The DDC is a communication protocol
through which the monitor automatically informs the host system about its
capabilities; for example, supported resolutions and corresponding timing. The
monitor supports the DDC2B standard.
Mode LED light
On Blue
Power saving Amber
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6
English
Connector pin assignment
19-pin Color Display Signal Cable*
* only for certain models
PIN No. Description PIN No. Description
1 TMDS Data2+ 2 TMDS Data2 Shield
3 TMDS Data2– 4 TMDS Data1+
5 TMDS Data1 Shield 6 TMDS Data1–
7 TMDS Data0+ 8 TMDS Data0 Shield
9 TMDS Data0– 10 TMDS Clock+
11 TMDS Clock Shield 12 TMDS Clock–
13 CEC 14 Reserved (N.C. on device)
15 SCL 16 SDA
17 DDC/CEC Ground 18 +5V Power
19 Hot Plug Detect
1357911
810 462
13151719
12141618
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7
English
24-pin color display signal cable*
PIN No. Description PIN No. Description
1 TMDS data 2- 13 NC
2 TMDS data 2+ 14 +5 V power
3 TMDS data 2/4 shield 15 GND (return for +5 V hsync.vsync)
4 NC 16 Hot-plug detection
5NC 17TMDS data 0-
6DDC clock 18TMDS data 0+
7 DDC data 19 TMDS data 0/5 shield
8NC 20NC
9 TMDS data 1- 21 NC
10 TMDS data 1+ 22 TMDS clock shield
11 TMDS data 1/3 shield 23 TMDS clock+
12 NC 24 DDC TMDS clock-
PIN No. Description PIN No. Description
1
13
2
14
3
15
4
16
17
18
7
19
20
9
10
11
12
5
8
6
Lane0(p)
GND
Lane0(n)
Lane1(p)
GND
Lane1(n)
Lane2(p)
GND
Lane3(n)
Lane3(p)
GND
Lane3(n)
Config1
Config2
AUX_CH (n)
GND
AUX_CH (p)
Hot Plug Detect
DP Power_Return
DP Power
20-pin color display signal cable*
* only for certain models
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8
English
Standard timing table
1
VGA 640x480 60 Hz
2
VGA 640x480 75 Hz
3
VESA 720x400 70 Hz
4
SVGA 800x600 60 Hz
5
SVGA 800x600 75 Hz
6
XGA 1024x768 60 Hz
7
XGA 1024x768 75 Hz
8
VESA 1152x864 75 Hz
9
VESA 1280x720 60 Hz
10
WXGA 1360x768 60 Hz
11
SXGA 1280x1024 60 Hz
12
SXGA 1280x1024 75 Hz
13
UXGA 1600x1200 60 Hz, RB
14
WSXGA+ 1680x1050 60 Hz
15
UXGA 1920x1080 60 Hz
16
WUXGA 1900x1200 60 Hz, RB
17
UXGA 2048x1152 60 Hz, RB
18
WQHD 2560x1440 60 Hz
19
WQHD 2560x1440 60 Hz, RB
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9
English
Installation
To install the monitor on your host system, please follow the steps below:
Steps
1 Connect the video cable
a Make sure both the monitor and computer are switched off.
(1) Make sure both the monitor and computer are switched off.
(2) Connect one end of the 24-pin DVI cable to the back of the
monitor and the other end to the computer's port.
2 Connect the power cord
Connect the power cord to the monitor, then to a properly grounded AC
outlet.
Turn on the monitor and computer
Turn on
the monitor first, then the computer. This sequence is very
important.
If the monitor does not function properly, please refer to the
troubleshooting section to diagnose the problem.
Connect the digital cable (only for DP models).
(1)
Make sure both the monitor and computer are switched off.
(2) Connect one end of the 20-pin DP cable to the back of the
monitor and the other end to the computer's port.
Optional:Connect the audio input socket(AUDIO IN) of the LCD monitor
and the line-out port on the computer with the audio cable.
3
4
5
HDMI Cable (Only HDMI-Input Model)
a. Make sure both the monitor and computer are powered-OFF.
b. Connect the HDMI cable to the computer.
b Connect the digital cable (only for dual-input models).
c
d
2
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EN-13
USER CONTROLS
Power Switch / Power LED:
To turn the monitor ON or OFF.
Lights up to indicate the power is turned ON.
Using the Shortcut Menu
Press the function button to open the shortcut menu. The shortcut menu lets you
quickly select the most commonly accessed settings.
Empowering:
Press the Empowering Key to open the Acer eColor Management OSD and access
the scenario modes.
MENU OSD functions
Press this botton to activate the OSD menu.
INPUT Input Key
Use Input key to select from different video sources that may be connected to
your monitor.
(a) HDMI input (b) DVI input (c) DP input
As you cycle through the sources you will see the following messages on right top
side of screen to indicate currently selected input source. It may take 1 or 2
seconds for the image to appear.
If either DVI input is selected ,but the DVI cables are not con-
nected, a floating dialog box indicates:
“No Cable Connect” or “No Signal”
HDMI or DVI or DP
PIP (picture in picture hotkey)
Use the PIP hotkey to active the picture-in-picture function.
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EN-14
Main
Menu
icon
Sub
Menu
icon
Sub
Menu
item
Description
N/AUser mode
User defined. Settings can be fine-tuned to
suit any situation
N/A
N/A
Standard
mode
Default Setting. Reflects native display
capability
N/A
Grahpic
mode
Enhances colors and emphasize fine detail.
Pictures and photographs appear in vibrant
colors with sharp detail.
N/A
Movie
mode
Displays scenes in clearest detail. Presents
great visuals, even in unsuitably-lit
environments.
Acer eColor Management
Operation instructions
Step 1: Press “ “ Key to open the Acer eColor Management OSD and
access the scenario modes
Step 2:Press “ “ or “ ” to select the mode
Features and Benefits
Step 3:Press “ “ Key to confirm the mode and exit the eColor menu.
mode
ECO
Adjusts the
settings to reduce power
consumption.
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EN-15
Adjusting the OSD settings
--------------------------------------------------------------------
Note: The following content is for general reference only. Actual
product specifications may vary.
The OSD can be used for adjusting the settings of your LCD Monitor.
Press the MENU key to open the OSD. You can use the OSD to adjust the
picture quality, OSD position and general settings. For advanced settings,
please refer to following page:
Adjusting the picture quality
1Press the MENU key to bring up the OSD.
2Using the
/ keys, select Picture from the OSD. Then navigate to
the picture element you wish to adjust.
3Use the / keys to adjust the sliding scales.
4 ThePicturemenucanbeusedtoadjusttheBrightness,Contrast,ColourTemp,
6‐axisSaturation,6‐axisHueandotherimage‐relatedqualities.
5 6‐axis Saturate: Adjust saturation of red, green, blue, yellow, magenta and
cyan6‐axisHue:Adjusthueforred,green,blue,yellow,magenta
andcyan.
6 DetectVideocanbeusedtodetectdynamicpictures,andthebackground
willfadeoutautomatically.Itwillbenotactivewhenvideoisplayedfull‐screen.
7 sRGBmodeincolourTemphasasetofbuilt‐indefaultsettings,whichenables
themonitortodisplaypanel's
optimalcolorquality.
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EN-17
Adjusting the setting
1Press the MENU key to bring up the OSD.
2Using the / keys, select Setting from the OSD. Then navigate to
the feature you wish to adjust.
3The Setting menu can be used to adjust the screen Menu Language and
other important settings.
4
Select Power-off USB charge ON/OFF to enable/disable Power-off USB
charge function.
5.SelectPIPtoadjustpicture‐in‐picturesettings.ThePIPsignal
sourceneedsto
beselectedmanually.Thetablebelowshowstheactive
inputcombinationsforPIP.
PIP On & Input status
PIP
Main
DVI HDMI1 HDMI2 DP
DVI
x x x v
HDMI1
x x x v
HDMI2
x x x v
DP
v v v x
x: Does not support PIP function in this combination
DPmodeselection
ThedefaultoutofDPsignalsettingintheB276HULisDP1.2.Usercan
followthesetting
message
to
confirm selection of DP1.2 or DP1.1
6
7
When using PIP, "Wide mode", "6-
axis Saturate", "6-axis Hue", "ACM"
and "Detect Video" will be enabled
for the main source display.
"Wide mode" is not supported when
using PBP function.
8
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Troubleshooting
Before sending your LCD monitor for servicing, please check the
troubleshooting list below to see if you can self-diagnose the problem.
DVI/HDMI mode
Problem LED status Remedy
No picture visible Blue Using the OSD, adjust brightness and
contrast to maximum or reset to their
default settings.
Off Check the power switch.
Check if the AC power cord is properly
connected to the monitor.
Amber Check if the video signal cable is
properly connected at the back of
monitor.
Check that the computer system is
switched on and in power saving/
standby mode.
Problem LED status Remedy
No picture visible Blue Using the OSD, adjust brightness and
contrast to maximum or reset to their
default settings.
Off Check the power switch.
Check if the AC power cord is properly
connected to the monitor.
Amber Check if the video signal cable is
properly connected at the back of
monitor.
Check that the computer system is
switched on and in power saving/
standby mode.
DP mode
DP daisy chain and repeat functions
DisplayPort bandwidth limitations mean that two monitors (at 2560 x 1440 resolution) or four monitors
(at 1920 x 1080 resolution) are supported in a daisy chain. Daisy chain function only works with DP signal.
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