1. Introduction
Thank you for choosing the iiyama G-Master G2766HSU-B1 27-inch Full HD Curved Gaming Monitor. This manual provides essential information for the safe and efficient operation of your new display. Please read it thoroughly before installation and use, and retain it for future reference.
The G-Master G2766HSU-B1 is designed to deliver an immersive gaming experience with its 1500R curved VA panel, Full HD (1920x1080) resolution, 165Hz refresh rate, and 1ms MPRT response time. It also features FreeSync Premium technology for fluid gameplay and a Black Tuner function for enhanced visibility in dark scenes.

Image 1.1: Front view of the iiyama G-Master G2766HSU-B1 monitor, showcasing its curved screen and branding.
2. Safety Information
Please observe the following safety precautions to prevent damage to the monitor and ensure your personal safety:
- Do not expose the monitor to rain or moisture to avoid fire or shock hazards.
- Do not open the monitor casing. There are no user-serviceable parts inside. Refer all servicing to qualified service personnel.
- Place the monitor on a stable, flat surface to prevent it from falling.
- Ensure proper ventilation. Do not block ventilation openings.
- Use only the power cord and adapter supplied with the monitor.
- Unplug the monitor from the power outlet during lightning storms or when unused for long periods.
- Keep the monitor away from direct sunlight, heat sources, and extreme temperatures.
3. Package Contents
Verify that all items are present and in good condition upon unpacking. If any items are missing or damaged, contact your retailer.
- iiyama G-Master G2766HSU-B1 Monitor
- Power Cable
- HDMI Cable
- DisplayPort Cable
- USB Cable (for USB hub functionality)
- Stand Base
- Stand Neck
- Quick Start Guide / User Manual (this document)
4. Setup
4.1. Assembling the Stand
- Carefully remove the monitor from its packaging, keeping it protected on a soft surface.
- Attach the stand neck to the back of the monitor until it clicks into place or is secured with screws (if applicable).
- Connect the stand base to the stand neck and secure it with the provided screw.
- Place the assembled monitor on a stable, flat desk or table.

Image 4.1: Rear view of the monitor showing the stand assembly and mounting area.
4.2. Connecting the Monitor
Ensure all devices are powered off before making connections.
- Power Connection: Connect the power cable to the monitor's power input and then to a wall outlet.
- Video Connection: Choose one of the following options:
- HDMI: Connect one end of the HDMI cable to the monitor's HDMI port and the other end to the HDMI output of your computer or device.
- DisplayPort: Connect one end of the DisplayPort cable to the monitor's DisplayPort and the other end to the DisplayPort output of your computer or device.
- USB Hub Connection (Optional): To enable the monitor's USB ports, connect the upstream USB cable (Type-B to Type-A) from the monitor to an available USB port on your computer.
- Audio Connection (Optional): If you wish to use external speakers or headphones, connect them to the monitor's audio output jack.

Image 4.2: Detailed view of the monitor's connectivity ports, including power, HDMI, DisplayPort, and USB.
5. Operating the Monitor
5.1. Power On/Off
Press the power button, usually located on the bottom right or rear of the monitor, to turn the monitor on or off. The power indicator light will illuminate when the monitor is on.
5.2. On-Screen Display (OSD) Menu
The OSD menu allows you to adjust various monitor settings. Use the control buttons (joystick or individual buttons) typically located on the bottom or rear of the monitor to navigate the menu.
- Press a menu button to activate the OSD.
- Use the navigation buttons (up/down/left/right or joystick) to select menu options.
- Press the select/enter button to confirm a selection or enter a sub-menu.
- Press the exit/back button to return to the previous menu or exit the OSD.
5.3. Key Features and Settings
- Refresh Rate (165Hz): Ensure your graphics card and operating system are configured to output 165Hz for the smoothest experience. This setting is usually found in your graphics driver control panel or Windows display settings.
- FreeSync Premium: This technology synchronizes the monitor's refresh rate with your GPU's frame rate to eliminate screen tearing and stuttering. Enable FreeSync Premium in the monitor's OSD menu and in your AMD graphics driver settings.
- 1ms MPRT: Motion Picture Response Time (MPRT) reduces motion blur. This setting can often be adjusted in the OSD, sometimes under an 'Overdrive' or 'Response Time' option.
- Black Tuner: Adjust this setting in the OSD to enhance visibility in dark areas of games without overexposing brighter regions. This can help reveal hidden enemies or details.
- Game Modes: The monitor may include pre-set game modes (e.g., FPS, RTS) that optimize display settings for specific game genres. You can also create and save custom game modes.
- Picture Settings: Adjust brightness, contrast, color temperature, and gamma to your preference.
- Input Select: Manually switch between HDMI and DisplayPort inputs if the monitor does not auto-detect the active source.
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your monitor.
- Cleaning the Screen: Gently wipe the screen with a soft, lint-free cloth. For stubborn marks, dampen the cloth with a small amount of non-ammonia, non-alcohol based screen cleaner. Do not spray cleaner directly onto the screen.
- Cleaning the Casing: Use a soft, dry cloth to wipe the monitor casing. Avoid abrasive cleaners.
- Ventilation: Ensure the ventilation openings on the back of the monitor are not blocked by dust or objects.
7. Troubleshooting
If you encounter issues with your monitor, refer to the following common problems and solutions:
| Problem | Possible Solution |
|---|---|
| No power / Power LED off | Check if the power cable is securely connected to the monitor and the power outlet. Ensure the power outlet is functional. |
| No image / "No Signal" message | Verify that the video cable (HDMI/DisplayPort) is securely connected to both the monitor and the computer. Ensure the correct input source is selected in the OSD menu. Check if the computer is powered on and not in sleep mode. |
| Image too dark or too bright | Adjust the brightness and contrast settings in the OSD menu. |
| Image flickering or unstable | Check the video cable for damage. Ensure your graphics card drivers are up to date. Verify the refresh rate setting in your computer's display settings. |
| Colors are incorrect | Adjust color settings (color temperature, gamma) in the OSD menu. Reset to factory defaults if necessary. |
| USB ports not working | Ensure the USB upstream cable is connected from the monitor to your computer. |
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | G2766HSU-B1 |
| Screen Size | 27 Inches (68.6 cm) |
| Panel Type | VA, Curved (1500R) |
| Resolution | 1920 x 1080 (Full HD) |
| Aspect Ratio | 16:9 |
| Refresh Rate | 165Hz |
| Response Time | 1ms MPRT |
| Brightness | 250 cd/m² (typical) |
| Video Inputs | HDMI, DisplayPort |
| USB Ports | 2 (USB Hub) |
| Audio Output | Headphone Jack |
| Dimensions (W x H x D) | Approx. 24.02 x 17.24 x 9.45 inches (with stand) |
| Weight | Approx. 11 pounds |
| Manufacturer | IIYAMA |
| Date First Available | July 9, 2021 |
9. Warranty and Support
iiyama products are manufactured to high standards and are designed for reliable performance. This product is covered by a manufacturer's warranty. Please refer to the warranty card included with your product or visit the official iiyama website for detailed warranty terms and conditions specific to your region.
For technical support, troubleshooting assistance beyond this manual, or service inquiries, please contact iiyama customer support through their official website or the contact information provided in your product documentation.
When contacting support, please have your monitor's model number (G2766HSU-B1) and serial number ready.





