1. Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your Targus 24-inch Secondary Monitor (DM4240SUSZ). This monitor is designed to extend your workspace display when used in conjunction with a primary Targus USB-C Docking Monitor (DM4240PUSZ, sold separately). It offers 1080p HD LCD graphics and adjustable viewing options to enhance productivity.

Image 1.1: The Targus 24-inch Secondary Monitor (DM4240SUSZ).
2. Package Contents
Verify that all items are present in the package before proceeding with the setup:
- Targus 24-inch Secondary Monitor (DM4240SUSZ)
- Monitor Stand (Base and Neck)
- DC Power Cable
- DisplayPort (DP) Daisy Chain Cable
- User Manual (this document)
3. Setup Instructions
3.1. Assembling the Monitor Stand
- Carefully remove the monitor and stand components from the packaging.
- Attach the stand neck to the monitor panel by aligning the tabs and pushing until it clicks into place.
- Attach the stand base to the stand neck. Secure it with the captive screw located on the underside of the base.
- Place the assembled monitor on a stable, flat surface.
3.2. Connecting the Monitor
The DM4240SUSZ secondary monitor is designed for daisy-chaining with a primary Targus USB-C Docking Monitor (DM4240PUSZ). Ensure your primary monitor is already set up and connected to your laptop.
- Connect the DC power cable to the power input port on the secondary monitor and then to a power outlet.
- Connect one end of the provided DisplayPort (DP) daisy chain cable to the DP Out port on your primary Targus USB-C Docking Monitor.
- Connect the other end of the DP daisy chain cable to the DP In port on the secondary monitor (DM4240SUSZ).
- Power on both monitors and your laptop. The secondary monitor should automatically detect the signal and extend your desktop.

Image 3.1: Example of monitor connections, showing DisplayPort daisy-chaining.
4. Operating Instructions
4.1. Powering On/Off
- To power on the monitor, press the power button located on the back or bottom bezel.
- To power off the monitor, press and hold the power button for a few seconds until the screen turns off.
4.2. Adjusting Display Settings
The monitor features an On-Screen Display (OSD) menu for adjusting various settings. Use the control buttons (usually located on the back or bottom bezel) to navigate the OSD menu.
- Brightness/Contrast: Adjust these settings to optimize visual comfort.
- Color Settings: Modify color temperature, gamma, and other color-related options.
- Input Source: Manually select the input source if auto-detection fails (e.g., DisplayPort).
- Aspect Ratio: Choose between various aspect ratio modes.
4.3. Physical Adjustments
The monitor stand allows for ergonomic adjustments:
- Height Adjustment: Gently push or pull the monitor panel up or down to achieve the desired height.
- Tilt Angle: Tilt the monitor panel forward or backward to adjust the vertical viewing angle.
- Swivel (Rotation): Rotate the monitor left or right on its base for horizontal viewing angle adjustments.
- Pivot (Portrait/Landscape Mode): Tilt the monitor fully upwards, then rotate the screen 90 degrees to switch between landscape and portrait orientations. Adjust your operating system's display settings accordingly.

Image 4.1: The monitor adjusted to portrait orientation.
5. Maintenance
5.1. Cleaning the Monitor
- Always power off the monitor and unplug the power cable before cleaning.
- Use a soft, lint-free cloth slightly dampened with water or a non-abrasive screen cleaner.
- Do not spray cleaner directly onto the screen. Apply it to the cloth first.
- Avoid using harsh chemicals, solvents, or abrasive materials, as these can damage the screen and casing.
5.2. General Care
- Avoid placing heavy objects on the monitor or its cables.
- Do not expose the monitor to extreme temperatures, humidity, or direct sunlight.
- Ensure adequate ventilation around the monitor to prevent overheating.
6. Troubleshooting
If you encounter issues with your monitor, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No image on screen | Monitor not powered on; Video cable loose or disconnected; Incorrect input source selected. | Ensure power cable is connected and monitor is on; Check DP daisy chain cable connection; Select correct input source via OSD menu. |
| Image is blurry or distorted | Incorrect resolution; Cable issue. | Set display resolution to 1920x1080 in your operating system settings; Ensure DP cable is securely connected. |
| Monitor not detected by computer | Cable issue; Driver issue (for primary monitor/dock); Power issue. | Verify all connections; Restart computer; Ensure primary monitor/dock drivers are up to date. |
| Screen flickers | Cable issue; Refresh rate mismatch. | Check DP cable; Adjust refresh rate in display settings. |
7. Specifications
Detailed technical specifications for the Targus 24-inch Secondary Monitor (DM4240SUSZ):
| Feature | Specification |
|---|---|
| Model Number | DM4240SUSZ |
| Screen Size | 24 Inches (23.8" diagonal viewable area) |
| Display Type | 1080p HD Backlit LCD |
| Native Resolution | 1920 x 1080 |
| Max Screen Resolution | 1920 x 1200 |
| Aspect Ratio | 16:9 |
| Connectivity | DisplayPort (DP) for daisy-chaining |
| Adjustments | Adjustable height, screen tilt, 360° rotation, portrait/landscape mode |
| Item Weight | 13.45 pounds (approx.) |
| Product Dimensions (LxWxH) | 42 x 18.7 x 68.5 inches (approx.) |
8. Warranty and Support
8.1. Limited Warranty
The Targus 24-inch Secondary Monitor (DM4240SUSZ) comes with an industry-leading 3-year limited warranty. This warranty covers defects in materials and workmanship under normal use. For full warranty terms and conditions, please refer to the warranty card included with your product or visit the official Targus website.
8.2. Technical Support
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact Targus Customer Support. Contact information can typically be found on the official Targus website or on the product packaging.
- Online Support: Visit the Targus support section on their official website.
- Phone Support: Refer to your region's Targus website for local contact numbers.





