1. Introduction
The MT-VIKI HK04 4-Port HDMI KVM Switch allows you to control up to four computers using a single set of peripherals: one monitor, one keyboard, and one mouse. This device also enables sharing of USB 2.0 devices such as speakers, USB drives, or printers among the connected computers. It supports 3D and EDID management, ensuring optimal display settings. The switch is designed for plug-and-play functionality, requiring no software installation for Windows, Mac OS, or Linux operating systems.
2. Package Contents
Please verify that all items listed below are included in your package:
- 1 x MT-VIKI HK04 4-Port HDMI KVM Switch
- 4 x 2-in-1 HDMI and USB KVM Cables (4ft/1.2m)
- 1 x Wire-Desktop Controller
- 1 x User Manual

Image: Contents of the MT-VIKI HK04 KVM Switch package.
3. Product Overview
The MT-VIKI HK04 KVM Switch features multiple ports for connecting your computers and peripherals. It includes HDMI input ports for video, USB-B ports for computer connections, and USB-A ports for keyboard, mouse, and other USB 2.0 devices. An HDMI output port connects to your monitor.

Image: Detailed diagram of the KVM switch ports and connections.
Video: An overview of the MT-VIKI KVM switch and its features.
4. Setup Instructions
Follow these steps to set up your MT-VIKI HK04 KVM Switch:
- Connect the Monitor: Plug your HDMI monitor into the HDMI OUT port on the KVM switch.
- Connect Peripherals: Connect your USB keyboard and USB mouse to the dedicated USB ports on the KVM switch. If using a wireless keyboard/mouse combo with a single receiver, connect the receiver to one of the dedicated USB ports or a general USB 2.0 hub connected to the KVM's USB 2.0 port.
- Connect Computers: Use the provided 2-in-1 HDMI and USB KVM cables. For each computer, connect the HDMI end to the computer's HDMI output and the USB-A end to a free USB port on the computer. Then, connect the other end of the 2-in-1 cable (HDMI and USB-B pigtail) to the corresponding PC input port on the KVM switch. Ensure the HDMI cable with the USB pigtail is correctly plugged into the computer port.
- Connect Optional USB Devices: If you wish to share other USB 2.0 devices (e.g., printer, USB drive, speakers), connect them to the available USB 2.0 ports on the KVM switch.
- Connect Desktop Controller: Plug the wire-desktop controller into the 'CONTROL' port on the KVM switch. This allows for convenient remote switching.
- Power On: Ensure all connections are secure, then power on your computers and monitor. The KVM switch draws power from the USB connections of the computers.

Image: Example setup of the KVM switch connecting multiple computers to shared peripherals.

Image: Correct and incorrect cable connection methods for the KVM switch.
Video: Step-by-step installation guide for the HDMI KVM switch.
5. Operating Instructions
The MT-VIKI HK04 KVM Switch offers two methods for switching between connected computers:
- Front Panel Button: Press the corresponding button on the front panel of the KVM switch to select the desired computer.
- Wire-Desktop Controller: Use the external wire-desktop controller to switch between computers. Each button on the controller corresponds to a specific computer port.
The KVM switch supports various operating systems including Windows 10/8/8.1/7/Vista/XP, Mac OS, and Linux, offering driver-free operation.

Image: Two methods for switching between connected computers.

Image: Visual representation of switching between four PCs.
6. Maintenance
To ensure the longevity and optimal performance of your KVM switch, follow these maintenance guidelines:
- Keep the device in a dry environment, away from moisture and extreme temperatures.
- Clean the exterior of the switch with a soft, dry cloth. Avoid using liquid cleaners or abrasive materials.
- Do not block ventilation openings on the device.
- Avoid dropping or subjecting the device to strong impacts.
7. Troubleshooting
If you encounter issues with your KVM switch, refer to the following common problems and solutions:
- No Display or Flickering Screen:
- Ensure all HDMI and USB cables are securely connected to both the KVM switch and the computers/monitor.
- Verify that the correct input source is selected on your monitor.
- Try restarting the KVM switch by disconnecting and reconnecting all cables, then rebooting the connected computers.
- Check if your monitor's refresh rate is compatible. Some KVMs may have issues with very high refresh rates (e.g., 144Hz) at certain resolutions. Adjust the refresh rate if necessary.
- Keyboard or Mouse Not Responding:
- Ensure the keyboard and mouse are connected to the dedicated USB ports on the KVM switch.
- If using a wireless keyboard/mouse, ensure the receiver is properly connected and has power. Try connecting the receiver to a general USB 2.0 port via a USB hub if direct connection to dedicated ports causes issues.
- Restart the KVM switch and the affected computer.
- Switching Delays:
- A brief delay (a few seconds) during switching is normal as the KVM establishes the connection. Excessive delays might indicate a cable issue or a need to restart the KVM and computers.
- Monitor Emulation:
- This KVM switch may not emulate a connected monitor on deselected computers. This means that when you switch to another computer, the previous computer might detect the monitor has been disconnected, causing windows to rearrange. This is a characteristic of some KVM designs.
Video: Solutions for common display issues like flickering or no signal.
8. Specifications
| Feature | Specification |
|---|---|
| Model | DH112257 |
| Brand | MT-VIKI |
| Number of Ports | 4 (HDMI Input) |
| Connector Type | Female HDMI |
| Switch Type | Push Button |
| Control Method | Touch, Wire-Desktop Controller |
| Operating Voltage | 5 Volts |
| Current Rating | 1 Amps |
| Material | Plastic |
| Color | Black |
| Item Dimensions (L x W x H) | 4.55 x 2.7 x 1.2 inches |
| Item Weight | 1 Pound |
| Connectivity Protocol | USB |
| International Protection Rating | IP54 |
9. Warranty Information
Please refer to the product packaging or contact MT-VIKI customer support for detailed warranty information specific to your region and purchase date. Typically, MT-VIKI products come with a limited warranty covering manufacturing defects.
10. Customer Support
For technical assistance, troubleshooting not covered in this manual, or warranty inquiries, please contact MT-VIKI customer support through their official website or the retailer from whom you purchased the product. Have your model number (DH112257) and purchase details ready for faster service.