BenQ LCD Monitor User Manual

Table of Contents

Refer to the original document for a detailed table of contents.

Copyright

Copyright © 2025 BenQ Corporation. All rights reserved. No part of this document may be reproduced, transmitted, transcribed, stored, or translated without the prior written permission of BenQ Corporation.

Disclaimer

BenQ Corporation makes no representations or warranties, express or implied, regarding the content herein and specifically disclaims all warranties of merchantability or fitness for a particular purpose. BenQ Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation to notify any person of such revisions or changes.

BenQ's flicker-free technology maintains a stable backlight with DC dimming, which eliminates the primary cause of flicker, providing better eye comfort. The effectiveness of the flicker-free function may be affected by external factors such as poor cable quality, unstable power supply, signal interference, or poor grounding. (Applies only to models with flicker-free function.)

Product Support

This document provides the most current and accurate information. Periodic changes may be made without prior notice. Visit the website for the latest version of this document and other product information. Available files vary by model.

1. Ensure your computer is connected to the internet.
2. Visit your local website at Support.BenQ.com. The website appearance and content may vary by region/country.
   • User Manual and related documents
   • Drivers and applications
   • (EU only) Disassembly information: Available on the user manual download page. This document is provided pursuant to Regulation (EU) 2019/2021 for the repair or recycling of your product. Always contact local customer service for service during the warranty period. If the product needs repair outside the warranty period, we recommend contacting an authorized service center to request spare parts from BenQ for compatibility. Do not disassemble the product unless you are aware of the consequences. If you cannot find disassembly information for your product, contact local customer service for assistance.

EPREL registration numbers:

• GW2491: 2125650
• GW2491E: 2125651
• GW2491T: 2125652
• GW2791: 2125655
• GW2791E: 2125659
• GW2791T: 2125661

Table of Contents (FAQ)

Start with the topic that interests you.

Setup

• How to set up and turn on the monitor?
• Safety precautions
• How to assemble the monitor hardware
• How to mount the monitor on the wall?
• Using the monitor wall mount kit (sold separately)

Eye Strain Reduction Features

• How to reduce the amount of blue light emitted from the screen?
• Using Low Blue Light Plus

Menus and Accessories

• How to use the on-screen display (OSD) menu?
• Basic menu operations
• Navigating the main menu

Product Maintenance and Support

• How to clean the monitor?
• Maintenance and cleaning
• How to store the monitor when not in use for a long time?
• How to detach the stand and base
• Maintenance and cleaning
• Need more support.
• Product support
• Servicing

Safety Precautions

Power Safety

Follow these safety instructions for optimal performance and long monitor life.

[Warning Symbol] Indicates information to prevent component damage, data loss, or personal injury due to incorrect use or improper operation.

[Light Bulb Symbol] Indicates useful information for completing a task.

[Pencil Symbol] Indicates additional information.

• The AC plug isolates the equipment from AC power supply.
• The power cord functions as a disconnect device for the equipment that is plugged into the power outlet. The wall socket should be located near the equipment and be easily accessible.
• This product should be operated from the type of power indicated on the nameplate. If you are unsure of the power type available, consult your dealer or local electric power company.
• Class I, Type A equipment that is connected to the power supply should be connected to a protective grounding.
• An approved power cord that is greater than or equal to H03VV-F or H05VV-F, 2G or 3G, 0.75 mm² should be used.
• Use only the power cord supplied by BenQ. Never use a power cord that appears damaged or frayed.
• To prevent monitor damage, do not use it in areas with an unstable power grid.
• Before plugging in the monitor, ensure the power cord is plugged into a grounded power outlet.
• To avoid potential hazards, check the total circuit load when using the monitor with a multi-outlet extension cord.
• Always unplug the monitor before unplugging the power cord.

For models with adapter:

• Use only the power adapter supplied with the LCD monitor. Using any other type of power adapter may cause malfunction and/or present a hazard.
• When using the adapter for device operation or battery charging, ensure adequate ventilation around the adapter. Do not cover the power adapter with paper or other objects that may obstruct cooling. Do not use the power adapter while it is in a bag.
• Connect the power adapter to an appropriate power source.
• Do not attempt to service the power adapter. There are no user-serviceable parts inside. Replace the unit if it is damaged or has been exposed to excessive moisture.

Installation

• Do not use the monitor in any of the following environmental conditions:
  • Extremely high or low temperatures or direct sunlight
  • Dusty locations
  • High humidity, exposure to rain, or near water
  • Exposure to vibrations or shocks in places such as cars, buses, trains, and other vehicles on rails
  • Heating devices such as radiators, heaters, fireplaces, and other heat-generating appliances (including audio amplifiers)
  • Enclosed spaces (such as wardrobes or bookshelves) without adequate ventilation
  • Uneven or inclined surfaces
  • Locations exposed to chemicals or fumes
• Handle the monitor with care.
• Do not place heavy objects on the monitor to prevent personal injury or damage to the monitor.
• Ensure that children do not hang or climb on the monitor.
• Keep the packaging materials out of the reach of children.

Operating Conditions

• For eye protection, refer to the user manual on how to set the optimal screen resolution and viewing distance.
• To reduce eye strain during monitor use, take regular breaks.
• Avoid performing any of the following actions for extended periods. Otherwise, signs of screen burn-in may occur.
  • Displaying images that do not cover the entire screen.
  • Leaving a static image on the screen.
• To avoid possible monitor damage, do not touch the screen with your fingertips, a pen, or any other sharp object.
• Frequent plugging and unplugging of video connectors may cause damage to the monitor.
• This monitor is primarily intended for personal use. If you intend to use the monitor in a public place or under severe environmental conditions, contact the nearest BenQ service center for assistance.
• To prevent electric shock, do not disassemble or repair the monitor.
• If you notice an unpleasant odor or hear an abnormal sound from the monitor, contact the nearest BenQ service center immediately.

Caution

• The distance between you and the monitor should be 2.5 to 3 screen widths diagonally.
• Prolonged screen viewing causes eye fatigue and may worsen vision. Rest your eyes every 5-10 minutes after 1 hour of use.
• Reduce eye strain by focusing your gaze on distant objects.
• Frequent blinking and eye exercises can prevent dry eyes.

Safety for Remote Control (if applicable)

• Do not place the remote control directly on a hot or humid surface, and avoid fire.
• Do not drop the remote control.
• Do not expose the remote control to water or moisture, as this may cause malfunction.
• Ensure there are no obstructions between the remote control and the remote control sensor on the product.
• If you do not use the remote control for an extended period, remove the batteries.

Battery Safety Notice (if applicable)

Using the wrong type of batteries may cause leakage or explosion. Please note the following:

• Ensure that batteries are inserted with the positive and negative terminals correctly oriented as shown in the battery compartment section.
• Different types of batteries have different characteristics. Do not mix different types of batteries.
• Do not mix old and new batteries. Mixing old and new batteries will shorten battery life or cause leakage of chemicals from the old batteries.
• Replace batteries as soon as they stop working.
• Chemicals leaking from batteries can cause skin irritation. If any chemical substance leaks from the battery, wipe it off immediately with a dry cloth and replace the batteries as soon as possible.
• Due to different storage conditions, the lifespan of batteries supplied with your product may be shortened. Replace them within 3 months or as soon as possible after initial use.
• There may be local regulations and restrictions for battery disposal or recycling. Contact your local government or waste disposal service provider.

If the supplied remote control contains a button cell battery, please read the following notice carefully:

• Do not swallow the battery. Chemical burn hazard.
• The remote control supplied with this product contains a button cell battery. If swallowed, a button cell battery can cause severe internal burns in as little as 2 hours, which can be fatal.
• Keep new and used batteries out of the reach of children. If the battery compartment does not close securely, stop using the product and keep it away from children.
• If you suspect a battery may have been swallowed or inserted into any part of the body, seek immediate medical attention.

Maintenance and Cleaning

• Do not place the monitor face down directly on the floor or table surface. Otherwise, scratches may occur on the screen surface.
• Before use, the equipment should be secured to a building structure or wall.
• (For models that support wall or ceiling mounting)
  • Mount the monitor and the monitor wall mount kit on a flat wall surface.
  • Ensure the wall is made of suitable material and that the standard wall mount bracket (sold separately) is strong and stable enough to support the monitor's weight. Refer to the product's technical specifications on the website for weight information.
• Disconnect the monitor and power supply before disconnecting cables from the LCD monitor.
• Always unplug the power cord from the wall socket before cleaning. Clean the LCD monitor surface with a soft, lint-free cloth. Avoid using any liquids, sprays, or glass cleaning agents.
• Slots and openings on the back or top of the housing are for ventilation. The openings should not be blocked or covered. This device should never be placed near or above a radiator or heat source, or in a built-in installation unless adequate ventilation is provided.
• Do not place heavy objects on the monitor to prevent personal injury or damage to the monitor.
• Store the box and packaging for future use if the monitor needs to be transported.
• Refer to the product's nameplate for power rating, manufacturing date, and identification marks.

Servicing

• Do not attempt to repair the product yourself, as opening or removing covers may expose you to dangerous voltage and other hazards. If any of the above improper uses or accidents such as dropping or improper handling occur, contact qualified service personnel for servicing.
• For replacement of power cords, signal cables, remote controls, or power adapters, contact BenQ customer service.
• For more information and support, contact your retailer or visit the local website at Support.BenQ.com.

General Warning Information

The monitor's warranty may be void if any of the following conditions occur:

• Service documents required for warranty service have been altered or are illegible.
• The model number or serial number on the product has been altered, erased, removed, or made illegible.
• Repairs, modifications, or alterations to the product have been performed by unauthorized service providers or individuals.
• Damage caused by improper storage of the monitor (including but not limited to force majeure, direct exposure to sunlight, water, or fire).
• Reception problems occur due to external signals (such as antennas, cable TV) outside the monitor.
• Malfunctions resulting from misuse or improper use of the monitor.
• If the user takes the monitor outside the region for which it was purchased and intended, the user is solely responsible for verifying that the monitor is compatible with local technical standards. Otherwise, product failure may occur, and the user will be responsible for repair costs.
• It is solely the user's responsibility if problems (such as data loss and system failure) occur due to the built-in firmware, parts, and/or non-original accessories.
• Use original equipment and accessories (e.g., power cord) exclusively with the device for which they are intended to prevent potential hazards such as electric shock and fire.

Typography

In this document, steps to open a source may be shown in a shortened form, e.g.: Menu > System > Information.

Getting Started

When unpacking, check if all listed items are included. If any part is missing or damaged, contact the seller for replacement.

LCD Monitor

The monitor itself.

Monitor Stand

The stand for the monitor.

Monitor Base

The base that supports the stand.

User Documents

• Quick start guide
• Important safety instructions
• Regulatory statements

Power Cord

(Supplied item may vary depending on model or region.)

Video Cable: HDMI

The cable for video connection.

[Note Symbol] Available accessories and images shown may differ from the actual content and product supplied in your region. Package contents may change without prior notice. Cables not supplied with the product can be purchased separately.

[Note Symbol] Consider keeping the box and packaging for future use if the monitor needs to be transported. The supplied foam packaging is ideal for protecting the monitor during transport.

[Note Symbol] Additional accessories and cables may be included or sold separately, depending on the product supplied in your area.

Always keep the product and accessories out of reach of small children.

Getting to Know Your Monitor

Front View

1. Power LED indicator

Rear View

1. Control buttons
2. Power button
3. AC power input
4. Kensington lock slot
5. DisplayPort socket
6. HDMI socket
7. Headphone jack
8. VESA mount

[Note Symbol] The drawing above may vary depending on the model.

[Note Symbol] The image may vary depending on the product supplied in your region.

[Note Symbol] (Applies to products with white housing) The product housing may turn yellowish after approximately 3 years due to light-induced photo-oxidation reactions. This is a normal phenomenon and should not be considered a manufacturing defect.

Connections

The following connection diagrams are for reference only. Cables not supplied with the product can be purchased separately. For a detailed description of connections, see page 15.

[Diagram: Connecting PC to Monitor]

[Diagram: Connecting Speakers/Headphones]

Connect the HDMI cable plug to the HDMI port on the monitor. Connect the other end of the cable to the HDMI port of the digital output device.

Connect the DP cable plug to the video socket on the monitor. Connect the other end of the cable to the video socket of the computer.

How to Assemble Monitor Hardware

• If the computer is on, it must be turned off before proceeding.
• Do not connect cables or turn on the monitor power until instructed to do so.
• The drawings in this document are for reference only and may differ from the actual product.
• The following drawings are for reference only. Port location and availability may vary depending on the model purchased.
• Avoid touching the screen surface with your fingers.
• The latch on the monitor stand/base of the same model may vary in design, but this generally does not affect the setup, function, or appearance of the product. Always assemble the monitor with the stand/base from the same package.

1. Attach the monitor stand and base.

Be careful not to damage the monitor. Placing the screen surface on an object like a stapler or mouse will break the glass or damage the LCD assembly, voiding your warranty. Sliding or dragging the monitor on a desk may scratch or damage the edges of the monitor and control buttons.

Clear and free up the desk surface and place a soft mat, such as the monitor's packaging bag, on it to protect the monitor and screen.

Carefully lay the screen face down on a clean, cushioned surface.

Connect the monitor stand to the monitor base as shown in the drawing until you hear a loud click.

[Warning Symbol] Be careful of sharp edges during assembly.

Align the stand arm with the monitor, then push them together until they click into place.

2. Connect video cable to your computer.

The supplied video cables and socket diagrams on the right may vary depending on the product supplied in your region.

[Diagram: Connecting Monitor to PC via HDMI/DP]

Connect the HDMI cable plug to the HDMI port on the monitor. Connect the other end of the cable to the HDMI port of the digital output device.

Connect the DP cable plug to the video socket on the monitor. Connect the other end of the cable to the video socket of the computer.

3. Connect headphones.

You can connect headphones to the headphone jack located below the rear of the monitor.

4. Connect the power cord.

Connect one end of the power cord to the socket marked with [Power Symbol] on the back of the monitor.

Connect the other end of the power cord to the socket and turn on the device.

The image may vary depending on the product supplied in your region.

5. Turn on the power.

Turn on the monitor by pressing the power button on the monitor.

Turn on the computer as well.

To extend the product's lifespan, we recommend using the power management function on your computer.

How to Detach the Stand and Base

1. Prepare the monitor and workspace.

Disconnect the monitor and power supply before unplugging the power cable. Disconnect the computer before unplugging the monitor signal cable.

Protect the monitor and screen by clearing and freeing up the desk surface and placing a soft mat, such as a towel, on it before laying the screen face down on a clean, cushioned surface.

Be careful not to damage the monitor. Placing the screen surface on an object like a stapler or mouse will break the glass or damage the LCD assembly, voiding your warranty. Sliding or dragging the monitor on a desk may scratch or damage the edges of the monitor and control buttons.

2. Remove the monitor stand.

Press and hold the quick-release button (1) and detach the stand from the monitor (2).

[Diagram: Releasing Monitor Stand]

3. Remove the monitor base.

Hold the monitor stand arm with one hand and push the locking clips to detach the monitor base from the stand arm.

[Diagram: Detaching Monitor Base]

Using the Monitor Wall Mount Kit (Sold Separately)

The back of the LCD monitor has a VESA standard mount with a 100 mm template for installing a wall mount bracket. Read the precautions carefully before installing the monitor wall mount kit.

Precautions

• Install the monitor and monitor wall mount bracket on a flat wall surface.
• Ensure the wall is made of suitable material and that the standard wall mount bracket (sold separately) is strong and stable enough to support the monitor's weight. Refer to the product's technical specifications on the website for weight information.
• Disconnect the monitor and power supply before disconnecting cables from the LCD monitor.

1. Remove the monitor stand.

Lay the screen face down on a clean, cushioned surface. Detach the monitor stand as described in How to Detach the Stand and Base on page 17.

Then, pull the monitor stand backward and remove it from the monitor.

[Diagram: Releasing Monitor Stand]

If you intend to use the monitor on the stand in the future, store the monitor base and stand in a safe place.

2. Follow the instructions in the separately purchased wall mount bracket manual during installation.

Use four M4 x 10 mm screws to attach the VESA standard wall mount bracket to the monitor. Ensure all screws are securely and properly fastened. For wall mount installation and precautions, consult a professional technician or BenQ service.

Adjusting the Monitor

The drawings and images in this document are for illustration purposes only. Actual content may vary for the product supplied.

Control Panel

Basic Menu Operations

Use the on-screen display (OSD) menu to adjust all monitor settings.

[Diagram: OSD Menu Navigation]

1. Press any control button.
2. The menu is displayed.
3. Follow the on-screen icons in the menu to adjust or select.

Press and hold the power button for 10 seconds to reset all menu settings.

Navigating the Main Menu

You can use the OSD menu to adjust monitor settings. For details, see Basic Menu Operations on page 19. Menu options may vary depending on input sources, functions, and settings. Menu options that are not available are displayed in light gray.

Selecting the Appropriate Color Mode

The monitor has different color modes suitable for different types of images.

1. Press any control button to display the menu.
2. Under Color Mode, select the desired image display mode.

Using Low Blue Light Plus

Low Blue Light Plus technology reduces the amount of blue light emitted from the screen to reduce the risk of eye exposure to blue light.

You can reduce blue light as desired, regardless of the color mode. To adjust Low Blue Light Plus settings:

1. Press any control button to display the menu.
2. Under Low Blue Light Plus, press +/- to adjust the level.

Adjustable On-Screen Display (OSD) Settings

While some settings (e.g., OSD menu language) are changeable and take effect immediately regardless of other monitor settings or input, most OSD settings can be adjusted and saved for use in certain color modes. Once a color mode is selected, the desired settings will be applied.

Resetting Settings

To reset all settings to factory defaults, press and hold the monitor's power button for 10 seconds.

Follow the on-screen instructions to reset and start with language settings.

Troubleshooting

Frequently Asked Questions (FAQ)

Image Appearance

[Question Mark Symbol] Image is blurry.

• Download the Resolution file from the website (see Product Support on page 3). See "Adjusting Screen Resolution". Then, select the correct resolution, refresh rate, and perform adjustments according to these instructions.
• If using a VGA extension cable, remove it before testing. Is the image now in focus? Download the Resolution file from the website (see Product Support on page 3). See "Adjusting Screen Resolution". Then, select the correct resolution, refresh rate, and perform adjustments according to these instructions to optimize the image. Image blurriness is normal due to losses in extension cables. You can minimize these losses by using extension cables with better conductivity or with a built-in amplifier.

[Question Mark Symbol] Does blurriness occur only at resolutions lower than the specified (maximum) resolution?

• Download the Resolution file from the website (see Product Support on page 3). See "Adjusting Screen Resolution". Then, select the specified resolution.

[Question Mark Symbol] Pixel errors are visible.

• One or more pixels are constantly black, one or more pixels are constantly white, or one or more pixels are constantly red, green, blue, or other colors.
• Clean the LCD screen.
• Turn the power on and off.
• These are pixels that are either permanently on or off, which is a natural defect that occurs in LCD technology.

[Question Mark Symbol] Image has incorrect colors.

• Looks yellow, blue, or pink.
• Open Color and Reset Color, then select YES to reset color settings to factory defaults.
• If the image is still not displayed correctly, and the OSD is also displaying incorrect colors, it means that one of the three primary colors is missing in the input signal. Now check the signal cable connections. If any pin is bent or broken, contact your retailer for assistance.

[Question Mark Symbol] Image is distorted, flickers, or jitters.

• Download the Resolution file from the website (see Product Support on page 3). See "Adjusting Screen Resolution". Then, select the correct resolution, refresh rate, and perform adjustments according to these instructions.

[Question Mark Symbol] Image is shifted in one direction.

• Download the Resolution file from the website (see Product Support on page 3). See "Adjusting Screen Resolution". Then, select the correct resolution, refresh rate, and perform adjustments according to these instructions.

[Question Mark Symbol] A faint shadow of a static image that was previously on the screen appears.

• Activate the power management function so that the computer and monitor enter "sleep" mode with low power consumption when not in use.
• Use a screen saver to prevent ghosting.

Power LED Indicator

[Question Mark Symbol] The LED indicator is white or amber.

• If the LED is constantly white, the monitor is on.
• If the LED is white and the screen displays an "Out of Range" message, it means the display mode is not supported by this monitor. Change the setting to a mode supported by this model. Download the Resolution file from the website (see Product Support on page 3). See "Adjusting Screen Resolution". Then, select the correct resolution, refresh rate, and perform adjustments according to these instructions.
• If the LED is amber, the power management mode is active. Press any key on the computer keyboard or move the mouse. If this does not help, check the signal cable connections. If any pin is bent or broken, contact your retailer for assistance.
• If the LED is off, check if the power outlet, external power source, and main switch are working.

OSD Control Buttons

[Question Mark Symbol] OSD control buttons are not available.

• To unlock the OSD control buttons when they are locked by default, press and hold any button for 5 seconds.

[Question Mark Symbol] How to change the OSD menu language?

• The OSD menu language can only be selected during the initial startup. To change the OSD menu language, you need to reset the settings. For details, see Resetting Settings on page 21.

OSD Messages

[Question Mark Symbol] "Out of Range" message on the screen during computer startup.

• If the "Out of Range" message appears on the screen during computer startup, it indicates that the computer's compatibility is caused by the operating system or graphics card. The system will automatically adjust the refresh rate. Wait for the operating system to start.

Need Help?

If problems persist after checking all items in this manual, contact your retailer or visit the local website at Support.BenQ.com for support and local customer services.