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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

VGA 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 power cord is properly connected to 
the monitor.

Orange

Check if the video signal cable is properly 
connected at the back of monitor.

Check if the computer system is switched on and 
in power saving/standby mode.

Unstable picture

Check if the specification of graphics adapter and 
monitor is in compliance which may be causing 
the input signal frequency mismatch.

Abnormal picture Image is missing, 

off-center, too 
large or too small 
on the screen.

Using the OSD, adjust focus, clock, H-position and 
V-position with non-standard signals.

Check the display setting on your system. In 
case of a missing image, please select another 
resolution or vertical refresh rate.

Wait for a few seconds after adjusting the size of 
the image before changing or disconnecting the 
signal cable or switching off the monitor.

Summary of Contents for DM431K

Page 1: ...Acer LCD Monitor User s Guide ...

Page 2: ...ided 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 th...

Page 3: ...structions 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 ...

Page 4: ...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 p...

Page 5: ... following the operating instructions 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 a...

Page 6: ...ur other products 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 http www acergroup com public Sustainability LCD pixel statement The LCD unit is produced with high pr...

Page 7: ... adjusting the viewing angle of the monitor using a footrest or raising your sitting height to achieve maximum comfort Observe the following tips refrain from staying too long in one fixed posture avoid slouching forward and or leaning backward stand up and walk around regularly to remove the strain on your leg muscles Taking care of your vision Long viewing hours wearing incorrect glasses or cont...

Page 8: ...e Avoid looking at bright light sources such as open windows for extended periods of time Developing good work habits Develop the following work habits to make your computer use more relaxing and productive Take short breaks regularly and often Perform some stretching exercises Breathe fresh air as often as possible Exercise regularly and maintain a healthy body In order to prevent damage to the m...

Page 9: ...ve is in conformity with the relevant Union harmonization legislations as below Directive and following harmonized standards and or other relevant standards have been applied EMC Directive 2014 30 EU EN 55032 2012 AC 2013 Class B EN 61000 3 2 2014 Class D EN 55024 2010 EN 61000 3 3 2013 LVD Directive 2014 35 EU EN 60950 1 2006 A11 2009 A1 2010 A12 2011 A2 2013 RoHS Directive 2011 65 EU EN 50581 20...

Page 10: ...operation The following local Manufacturer Importer is responsible for this declaration Product LCD Monitor Model Number DM431K SKU Number DM431K 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 Acer Amer...

Page 11: ...ions Commission Declaration of Conformity Unpacking Attaching removing the base Connecting the power cord Power saving Display Data Channel DDC Connector pin assignment Standard timing table Installation User controls How to adjust a setting Mode Management Menu Adjusting the OSD settings Adjusting the picture quality Adjusting the Color setting Adjusting the Audio setting Adjusting the Performanc...

Page 12: ...ack 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 LCD monitor DM1 series DM431K USER GUIDE AC power cord DP cable Option HDMI cable Option VGA cable Option Audio cable Option Remot control ...

Page 13: ...se Installation By aligning the front end of the bracket with the corresponding slot on the back of the display and fix the stand onto the display by screwing the four screws clockwise Remove Reverse the steps to remove the base ...

Page 14: ...for the country 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 orange colored power LED Model LED light On Blue Power saving Orange 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 powe...

Page 15: ...ription 1 TMDS data 2 11 TMDS clock shield 2 TMDS data 2 shield 12 TMDS clock 3 TMDS data 2 13 CEC 4 TMDS data 1 14 DDC serial data 5 TMDS data 1 shield 15 SCL 6 TMDS data 1 16 SDA 7 TMDS data 0 17 DDC CEC Ground 8 TMDS data 0 shield 18 5V Power 9 TMDS data 0 19 Hot Plug Detect 10 TMDS clock ...

Page 16: ...o Description PIN No Description 1 Lane0 p 11 GND 2 GND 12 Lane3 n 3 Lane0 n 13 Config1 4 Lane1 p 14 Config2 5 GND 15 AUX_CH n 6 Lane1 n 16 GND 7 Lane2 p 17 AUX_CH p 8 GND 18 Hot Plug Detect 9 Lane3 n 19 DP Power_Return 10 Lane3 p 20 DP Power ...

Page 17: ...al cable PIN No Description PIN No Description 1 Red 9 5V 2 Green 10 Logic ground 3 Blue 11 Monitor ground 4 Monitor ground 12 DDC serial data 5 DDC return 13 H sync 6 R ground 14 V sync 7 G ground 15 DDC serial clock 8 B ground ...

Page 18: ...0 600 75 Hz 10 MAC 832 624 74 55 Hz 11 XGA 1024 768 60 Hz 12 XGA 1024 768 70 Hz 13 XGA 1024 768 75 Hz 14 MAC 1152 870 75 Hz 15 VESA 1152 864 75 Hz 16 VESA 1280 960 60 Hz 17 SXGA 1280 1024 60 Hz 18 SXGA 1280 1024 75 Hz 19 VESA 1280 720 60 Hz 20 WXGA 1440 900 60 Hz 21 WSXGA 1680 1050 60 Hz 22 FHD 1920 1080 60 Hz 23 QHD 2560 1440 60 Hz 24 UHD 3840 2160 30 Hz 25 UHD 2160p 25 Hz 26 UHD 2160p 24 Hz 27 U...

Page 19: ...e 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 2 Connect the power cord Connect the power cord to the monitor then to a properly grounded AC outlet 3 Optional Connect the audio input socket AUDIO IN of the LCD monitor and the line out port on t...

Page 20: ...OSD b Press this button to select the desired item when in OSD menu 4 Input source switching Right a Use the INPUT hotkey to enter Input select function b Press this button to select the desired item when in OSD menu 5 Empowering Key Down a Press this button to select scenario mode b Press this button to select the desired item when in OSD menu 6 Volume Key Left a Press this button to adjust volum...

Page 21: ...ith sRGB mode but for the Rec 709 color space N A HDR HDR mode provide a High Dynamic Range to helps create lifelike images while replicating accurate details in lighting and shades to create a picture which is truthfully bright or dark without sacrificing detail N A User Mode In User mode the settings can be fine tuned to suit any situation N A Standard Mode The default setting demonstrates the n...

Page 22: ... Clock qualities 5 Brightness Adjust the brightness from 0 to 100 Note Adjusts the balance between light and dark shades 6 Contrast Adjust the contrast from 0 to 100 Note Sets the degree of difference between light and dark areas 7 Black Boost Adjust the black level from 0 to 10 Enhances shadows by increasing the brightness without changing lighter shades 8 Blue Light Filters out blue light to pro...

Page 23: ...off Note Set to Auto Auto checked input source ability to provide HDR Set to Off No support HDR effect 12 Auto Config To automatically adjust H V Position Phase adjust and Clock adjust VGA only 13 H Position To adjust the horizontal position of the video VGA only 14 V Position To adjust the vertical position of the video VGA only 15 Focus To adjust the delay time of data and clock VGA only 16 Cloc...

Page 24: ...e feature you wish to adjust 3 Use the keys to adjust the sliding scales 4 The Performance menu can be used to adjust the screen Over Drive and Refresh Rate Num settings Adjusting the Audio setting 1 Press the key to bring up the OSD 2 Using the keys select Audio from the OSD Then navigate to the feature you wish to adjust 3 Use the keys to adjust the sliding scales Mode Standard Move Enter Exit o...

Page 25: ...l OSD Key lock On Off Note OSD Locked Set the OSD Lock to On by the OSD option and press Enter to execute the All Key lock function The OSD Locked message will be displayed in the middle of the screen LED lights will be changed from blue light to orange light Press any Key screen to prompt OSD Locked message OSD Unlocked In normal display condition to press the OSD Key 3 in the middle of more than...

Page 26: ...eature you wish to adjust 3 Use the keys to adjust the sliding scales 4 The Performance menu can be used to adjust the Input Auto Source DP Format Wide Mode PIP PBP Hot Key Assignment and other important settings 5 DDC CI Allows the monitor settings to be set through the software on the PC Note DDC CI short for Display Data Channel Command Interface which allows monitor controls to be sent via sof...

Page 27: ... monitor Check if the computer system is switched on and in power saving standby mode Unstable picture Check if the specification of graphics adapter and monitor is in compliance which may be causing the input signal frequency mismatch Abnormal picture Image is missing off center too large or too small on the screen Using the OSD adjust focus clock H position and V position with non standard signa...

Page 28: ...e Unstable picture Check if the specification of graphics adapter and monitor is in compliance which may be causing the input signal frequency mismatch Abnormal picture Image is missing off center too large or too small on the screen Check the display setting on your system In case of a missing image please select another resolution or vertical refresh rate Wait for a few seconds after adjusting t...

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