If you’ve ever wanted to display the same video on two TVs at once or mirror your computer screen across dual monitors, an HDMI splitter could be a useful tool. It’s a simple yet versatile device that allows you to duplicate an HDMI signal, letting you share content across multiple screens.

In this guide, we’ll walk you through how to set up an HDMI splitter step by step, explain what to look out for, and help you address common issues.

What Does an HDMI Splitter Do?

An HDMI splitter takes one video signal from a single source and sends it to two or more output devices, such as TVs or monitors. This can be helpful for watching a movie on two screens simultaneously, showing the same presentation in different rooms, or extending digital signage in various settings.

It’s important to note that a basic HDMI splitter will duplicate the signal, not create two separate desktops. Therefore, both screens will show the same image.

What You’ll Need

Before setting up your HDMI splitter, make sure you have the following:

• A reliable HDMI splitter (preferably powered for improved performance)

• One HDMI cable to connect your source device (e.g., laptop, Blu-ray player, games console)

• Two HDMI cables to connect to your output devices (e.g., TVs, monitors)

• Power supply (if your splitter requires it)

Once you have your components ready, you can begin the setup process.

Step-by-Step Setup Guide

1. Connect the HDMI splitter to your source device: Plug one end of the HDMI cable into your device’s HDMI output port, and the other end into the splitter’s input port.
2. Connect your displays to the splitter: Plug two HDMI cables into the splitter’s output ports, then connect the other ends to your TVs or monitors.
3. Power everything up: Turn on your source device and both displays. If your HDMI splitter is powered, plug it into the mains or a USB power source as required.
4. Select the correct HDMI input on your screens: Use your TV or monitor remote to switch to the HDMI input connected to the splitter. You should now see the same image on both screens.

And that’s it. If all your devices are compatible, the setup should work without further adjustments.

Tips for the Ideal Performance

• Use a powered splitter if you plan to connect more than two displays or need to handle long HDMI cable runs. Powered splitters help boost the signal and can maintain better quality.
• Match the resolution and refresh rate of your displays. The splitter will typically output to the lowest common resolution, so if one TV is 1080p and the other is 4K, both may display at 1080p.
• Keep cables under 5 metres when possible to avoid signal degradation. For longer runs, you may need higher-quality cables or a signal booster.
• Use quality cables and a reputable splitter to reduce compatibility issues and ensure a stable connection.

Common Troubleshooting Tips

If your screens don’t display anything:

• Check that all cable connections are secure.

• Try powering off all devices and restarting them.

• Confirm that the source device is outputting via HDMI.

• Make sure your splitter supports the resolution of your content.

If the issue persists, test each display and cable individually to pinpoint the problem.

Final Thoughts

Setting up an HDMI splitter is generally straightforward, and when done correctly, it opens up several possibilities for home entertainment, business presentations, or digital signage. Just keep in mind that a splitter mirrors your display rather than extending it, so it’s particularly useful when you want the same image on multiple screens.

If you’re looking for a reliable HDMI splitter to get started, Maplin offers a selection that can suit a variety of setups, from simple configurations to more demanding environments.

Published by Joseph T.