Product Support

Receive help on your LG product

Learn about LG product's latest software information and tips.

Mobile
Monitors
20MK400H-B

20MK400H-B

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Manuals & Documents
Software & Firmware
How-to & Tips
Video Tutorials

Manuals & Documents

For the most accurate technical information regarding features, specifications, installation and operation of your LG product, please refer to the Owner's Manual and other documents available for this product.

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Acrobat Reader

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Software & Firmware

SOFTWARE UPDATE
Learn more about warranty information
WAY 1.FOTA
It allows you to conveniently update your phone's software to a newer version via Firmware Over-the-Air (FOTA) without connecting with to USB datge cable. Learn more
WAY 2.USB Driver
- 1Install the USB DRIVER
  
  After executing LG Mobile Support Tool in Step3, you can download USB Driver. View the USB Driver Installation
- 2Install and Execute the LG MOBILE SUPPORT TOOL
  
  Download
- 3Connect your phone to PC by using the bundled USB Cable
- 4Install the USB DRIVER
The phone software upgrade stopped before completion?

Don't close the update tool, disconnect the cable and reconnect it. And check the USB Driver connection on our PC. After that, please restart the update.

Otherwise, please select "Customer Support"-"Recovery Phone" in LG MOBILE SUPPORT TOOL. Then, you can start to recover your phone.

How-to & Tips

- Troubleshooting
- Consumer Monitors, Monitors
04/25/2017
[OSC] ScreenSplit_compatibility_with_games_ENG_20151224pptx

Dear Sir/Madam, Pls see the attached file for detailed info.
- Operation
- Consumer Monitors, Monitors
02/11/2016
Video] How do I set the Dual Controller function on my Ultra Wide Monitor?
- Operation
- Consumer Monitors, Monitors
02/11/2016
Video] How do I use the 4-way screen split function on my Ultra Wide Monitor?
- Operation
- Consumer Monitors, Monitors
02/11/2016
Video] How do I use the Dual Controller and PBP function?
- Operation
- Consumer Monitors, Monitors
09/18/2015
[VIDEO] Ultrawide Monitor: Intro - MONITOR

Video Tutorials

Compliance Information

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LG Support
At LG, we create innovative, stylish, state-of-the-art products and back them up with LG Customer Service and Support designed to make life good. Whether you need owner’s manuals, parts and accessories, mobile phone support, or warranty information, you’ll find LG Technical Support and everything else you need ? just a few clicks away. If you want to speak with someone, LG LK Support has courteous, respectful and knowledgeable individuals that can assist you with all technical support and service issues.