KOORUI G2421V
KOORUI G2421V 24-inch WQHD 180Hz Gaming Monitor User Manual
Model: G2421V
1. Introduction
Thank you for choosing the KOORUI G2421V 24-inch WQHD 180Hz Gaming Monitor. This monitor is designed to provide an immersive visual experience with its high refresh rate, fast response time, and vibrant display. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your monitor. Please read it thoroughly before use.
2. Safety Information
To ensure safe operation and prolong the life of your monitor, please observe the following safety precautions:
- Do not expose the monitor to rain, moisture, or extreme temperatures.
- Avoid placing the monitor in direct sunlight or near heat sources.
- Ensure proper ventilation around the monitor to prevent overheating.
- Use only the power adapter and cables provided by the manufacturer.
- Do not attempt to open or repair the monitor yourself. Refer all servicing to qualified personnel.
- Keep the monitor away from strong magnetic fields.
- Disconnect the power cable from the outlet during lightning storms or when unused for long periods.
3. Package Contents
Verify that all items are present in your package:
- KOORUI G2421V Gaming Monitor
- Monitor Stand (Base and Neck)
- DP (DisplayPort) 1.4 Cable x 1
- Power Adapter
- User Manual
4. Setup
4.1. Assembling the Stand
- Carefully remove the monitor from its packaging, keeping the screen protected.
- Attach the stand neck to the monitor panel. Ensure it clicks securely into place.
- Attach the stand base to the stand neck and tighten the screw at the bottom of the base.
Note: The monitor supports VESA mount (75x75mm) for alternative mounting solutions. Ensure the VESA mount is compatible and can support the monitor's weight (3.07 kg).

Image: Rear view of the monitor illustrating the VESA mount (75x75mm) and stand attachment area.
4.2. Connecting Cables
Connect the necessary cables to your monitor and computer/gaming console:
- Power Cable: Connect the power adapter to the monitor's power input and then to a power outlet.
- DisplayPort (DP): For optimal performance (180Hz, WQHD), connect the provided DP 1.4 cable from your computer's graphics card to the monitor's DP input.
- HDMI: Alternatively, use an HDMI 2.0 cable to connect your device to one of the monitor's two HDMI inputs.
- Audio Out: Connect external speakers or headphones to the 3.5mm audio output jack if desired.

Image: Detailed view of the monitor's input ports, including two HDMI 2.0, one DisplayPort 1.4, and an audio output.
4.3. Initial Power-On
After connecting all cables, press the power button located on the back of the monitor to turn it on. The monitor will automatically detect the active input source.
5. Operating Instructions
5.1. On-Screen Display (OSD) Menu Navigation
The monitor features a joystick control on the back for navigating the OSD menu. Press the joystick to open the OSD menu. Move the joystick up, down, left, or right to select options and adjust settings.

Image: The OSD joystick control, used for navigating the monitor's settings menu.
5.2. Picture Settings
Adjust display settings for optimal viewing:
- Brightness: Adjust the overall luminance of the screen (350 nits maximum).
- Contrast: Adjust the difference between light and dark areas.
- Color Temperature: Select from preset modes (e.g., Warm, Cool, User) or adjust RGB values manually.
- HDR Mode: Enable or disable HDR400 for enhanced dynamic range.
- Blue Light Filter: Reduce blue light emission to minimize eye strain during prolonged use.
5.3. Gaming Features
Optimize your gaming experience with these settings:
- Refresh Rate: The monitor supports up to 180Hz. Ensure your graphics card settings are configured to utilize this refresh rate.
- Response Time (GTG): Set to 1ms for minimal motion blur.
- Adaptive Sync: Enable Adaptive Sync (compatible with FreeSync and G-Sync) to eliminate screen tearing and stuttering.

Image: Comparison of screen tearing with Adaptive Sync OFF and smooth display with Adaptive Sync ON.
5.4. Input Selection
You can manually select the input source through the OSD menu if the monitor does not automatically switch to the desired input.
6. Maintenance
6.1. Cleaning the Monitor
To clean your monitor:
- Always unplug the monitor from the power outlet before cleaning.
- Use a soft, lint-free cloth slightly dampened with water or a mild, non-abrasive screen cleaner.
- Do not spray cleaner directly onto the screen.
- Avoid using benzene, thinner, ammonia-based cleaners, or abrasive materials.
6.2. General Care
- Avoid touching the screen with sharp objects.
- Do not place heavy objects on the monitor or its cables.
- Store the monitor in a cool, dry place if not in use for an extended period.
7. Troubleshooting
If you encounter issues with your monitor, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No image on screen | Power cable disconnected; Video cable disconnected; Incorrect input source selected. | Ensure power and video cables are securely connected. Select the correct input source via the OSD menu. |
| Image is blurry or distorted | Incorrect resolution; Graphics card driver issue. | Set the display resolution to 2560x1440. Update your graphics card drivers. |
| Screen tearing or stuttering | Adaptive Sync is off; Graphics card not compatible or drivers outdated. | Enable Adaptive Sync in the OSD menu and your graphics card settings. Ensure your graphics card supports Adaptive Sync and has updated drivers. |
| No sound from audio out | Audio cable disconnected; Volume too low; Incorrect audio output selected on PC. | Check audio cable connection. Adjust volume on monitor and PC. Ensure correct audio output device is selected on your computer. |
| Monitor randomly turns off | Loose power connection; Overheating; Faulty cable. | Check power cable connection. Ensure adequate ventilation. Try a different DP/HDMI cable. If the issue persists, contact support. |
If the problem persists after trying these solutions, please contact KOORUI technical support.
8. Specifications
| Feature | Specification |
|---|---|
| Model | G2421V |
| Screen Size | 23.8 inches |
| Panel Type | Fast IPS |
| Resolution | WQHD (2560 x 1440 pixels) |
| Aspect Ratio | 16:9 |
| Refresh Rate | 180 Hz |
| Response Time | 1 ms (GTG) |
| Brightness | 350 cd/m² |
| Contrast Ratio | 1000:1 |
| Color Gamut | 90% DCI-P3 |
| HDR Support | HDR400 |
| Viewing Angle | 178° (H) / 178° (V) |
| Adaptive Sync | Yes (FreeSync & G-Sync Compatible) |
| Video Inputs | 2 x HDMI 2.0, 1 x DisplayPort 1.4 |
| Audio Output | 1 x 3.5mm Audio Jack |
| VESA Mount | 75 x 75 mm |
| Dimensions (WxHxD) | Approx. 54.2 x 42.8 x 6.0 cm (without stand) |
| Weight | 3.07 kg |
| Additional Features | Blue Light Filter, Tilt Adjustment (-5° to 20°) |
9. Warranty and Support
9.1. Warranty Information
The KOORUI G2421V monitor comes with a 1-year warranty for the display panel and a 3-year warranty for other accessories from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
If a display defect occurs within 30 days of purchase, please contact Amazon for a free return. After 30 days, please contact KOORUI technical support directly.
In the event of a product malfunction under normal use and environment, and if KOORUI technical support determines it to be a defect, repair services will be provided by a local repair center in Japan. Shipping costs to the repair center are the customer's responsibility; return shipping costs after repair will be covered by KOORUI.
9.2. Technical Support
For technical assistance or warranty claims, please contact KOORUI support:
- Email: JP.support@Koorui.net (Response within 24 hours)
- Phone: 0120-998-066 (Operating hours: 10:00-13:00; 14:30-19:00, Monday-Friday)
When contacting support, please have your product model (G2421V) and purchase information ready.
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