If you work with two different computers—maybe a desktop and a laptop, or two PCs for different tasks—you don’t always need two separate monitors taking up space on your desk. The good news is that most modern displays let you switch between multiple devices easily, and in many cases, you only need a few cables and a quick settings tweak to get everything running smoothly.
In this guide, we’ll walk you through all the ways you can connect two computers to a single monitor and switch between them without unplugging cables every time.
What You’ll Need
Before we begin, here’s what you’ll need to follow the steps comfortably:
To use two computers with one monitor, you’ll need a display that supports multiple video input ports such as HDMI, DisplayPort, USB-C, or VGA. Make sure you have the right video cables for both computers, and if you prefer seamless switching, a monitor with built-in input switching controls or a KVM switch will make your setup even easier to manage.
1. Check Your Monitor’s Available Ports
Most modern monitors come with multiple input ports. You just need to identify which ones you can use for each computer.
Common input ports include:
- HDMI
- DisplayPort (DP)
- USB-C with DisplayPort Alt Mode
- VGA (older monitors)
How to check your monitor’s ports:
- Look at the back or bottom of your monitor to locate available input ports.
- Check the labels. You should see names like HDMI 1, HDMI 2, DP, or USB-C.
- Note which ports are free so you can match them with the ports on your computers.
2. Connect Each Computer to a Different Video Port
The key to using two computers with one display is to assign each computer its own input port.
Connect Computer 1
- Plug the appropriate cable (HDMI, DP, or USB-C) into your monitor.
- Connect the other end of the cable to Computer 1.
- Make sure the cable is firmly attached on both ends.
Connect Computer 2
- Now take a second compatible cable.
- Plug it into another available input port on your monitor.
- Connect the other end to your second computer.
You don’t have to use matching ports—one PC can use HDMI while the other uses DisplayPort. As long as your monitor supports both, you’re good to go.
3. Switch Between the Two Computers (Using the Monitor Controls)
Once both computers are connected, switching between them is easy.
- Turn on your monitor.
- Press the Input, Source, or Menu button on your monitor.
- Use the navigation buttons to select the input that matches the computer you want to use (for example, HDMI 1 or DP).
- The monitor will switch to that computer’s display instantly.
This method works on almost all monitors.
4. Use a KVM Switch (Optional but More Convenient)
If you want a smoother experience—especially if you’re using one keyboard and mouse for both computers—you should consider a KVM switch.
A KVM switch lets you:
- Share one keyboard
- Share one mouse
- Share one monitor
- Switch between two computers with a single button
How to use a KVM switch
- Connect your monitor’s video cable to the display output of the KVM switch.
- Plug your keyboard and mouse into the USB ports on the KVM switch.
- Now connect each KVM cable set to both computers.
- Press the KVM switch button to toggle between Computer 1 and Computer 2.
Some advanced KVMs even support:
- 4K displays
- USB-C charging
- Peripheral sharing (webcams, microphones, etc.)
5. Use USB-C Monitors With Built-in KVM (If Available
Many high-end monitors now come with USB-C ports and a built-in KVM feature. If your monitor supports this, you can switch between two computers without buying extra hardware.
How it works
- Connect one computer using USB-C.
- Connect the second computer using HDMI or DP.
- Plug your keyboard and mouse into the monitor’s USB ports.
- Use the monitor’s built-in input switch to change computers.
- The keyboard and mouse automatically switch along with the display.
This setup is perfect for dual-PC workflows like office work + gaming, or work PC + personal laptop.
6. Troubleshooting Tips
If your monitor isn’t detecting one of your computers, here are a few things you should check:
Make sure the computer is powered on
Sometimes the system may be asleep or in hibernation. Wake it up or restart it to be sure.
Check the cable connections
Loose HDMI or DisplayPort cables are a common cause of blank screens.
Try a different cable
Faulty or aging cables—especially HDMI—can fail without warning, so swapping it out is a quick way to rule out cable issues.
Verify the input source
Confirm that the monitor’s input setting matches the port your device is connected to.
Update graphics drivers
If the PC still isn’t sending video output, update the graphics drivers through Device Manager or download the latest version from the GPU manufacturer’s website.
Wrapping Up
Using two computers with one display monitor is one of those small upgrades that instantly makes your workspace cleaner and more efficient. Whether you’re switching between a work laptop and a personal PC or juggling gaming and productivity machines, you can connect everything once and toggle between them with a single button press. And if you want an even smoother experience, a KVM switch or a monitor with built-in KVM support will make your workflow feel seamless.
If you want, I can also write a separate guide on how to share one keyboard and mouse between two computers, or provide custom images and diagrams for this post.
