How to connect two towers to one monitor

Written by dustin lamb
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How to connect two towers to one monitor
A KVM switch is required to use two PCs with one monitor. (Monitor image by Caila from

Connecting two computer towers to one monitor requires only one additional device. This is a KVM (Keyboard, video, mouse) switch. An advantage of using this device is that a keyboard and mouse are also shareable between both computers. The way this works is that both computers are attached to the device using a video cable, and one video cable attaches the switch to the monitor. You need to use this solution when your monitor has only one input.

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Things you need

  • KVM switch

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  1. 1

    Turn off the computers and monitor. Connect a VGA video cable to both computer towers.

  2. 2

    Attach the connections from the VGA cables to the 1 and 2 inputs on the KVM switch. Attach mouse and keyboard patch cables to the inputs for both computers on the switch, connected to each tower, in order to share a keyboard and mouse.

  3. 3

    Attach a VGA cable from the output on the KVM switch to the input on the computer monitor. Attach a keyboard and mouse to the correct outputs on the switch to share these devices between the computers.

  4. 4

    Power on the monitor and both computers. Press the button on the KVM switch to switch between the first and second computer tower inputs.

  5. 5

    Label the inputs on the switch to keep track of the connections, as there are a lot of connections. Make sure all of the cables are fully connected.

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