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How to Install Two Computer Monitors

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This article will show you how to set up a second monitor for your Windows or Mac computer. Using two monitors doubles the display space for your desktop.

Check the second screen support

Image titled Connect PC to TV with HDMI Step 1

Image titled Connect PC to TV with HDMI Step 1

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Most laptops support two monitors. If your laptop has at least one video output port (such as an HDMI or VGA port), you can attach an external display via the video port.

  • Some Windows laptops don’t support dual monitors, but all Apple MacBooks do – if you’re using a Mac, skip to the second monitor connection section. [1]
Image titled Build a Computer Step 2

Image titled Build a Computer Step 2

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Not all desktops support two monitors. Your computer’s graphics card and motherboard determine whether you can use two monitors at the same time. [2]

  • Again, if you use an Apple iMac desktop computer, you can use two monitors.
Image titled Connect HDMI Cables Step 12

Image titled Connect HDMI Cables Step 12

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Check your computer’s video output port. Most computers have at least two video output ports; that means you can usually connect to a second monitor. However, if the computer has two (or more) ports that are not in the same row, they do not have the same graphics card and cannot be used to connect two monitors. [3]

  • For example, if you see two HDMI ports side by side horizontally (or vertically), it means your computer’s graphics card supports two monitors. This also applies to other outputs (such as the VGA output in addition to the HDMI output).
  • Desktop Windows computers typically have these three ports on the back of the case.
  • If you only see one video output port on your desktop, your computer’s graphics card only supports one monitor. Laptops with a single video output port can often support multiple monitors.
Image titled Build a Computer Step 9

Image titled Build a Computer Step 9

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Determines whether the computer’s motherboard supports two monitors. Nearly all motherboards on newer computers support multiple monitors, but older machines may not. You need to do the following steps to check if the motherboard supports dual monitors:

  • Find the name of the motherboard.
  • Type the name of the motherboard into a search engine (such as Google).
  • Select a search result that lists motherboard features.
  • Look for the “Multi-Display”, “Multi-Monitor” or “Dual Display” feature.
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Second monitor connection

Image titled Set Up Dual Monitors Step 1

Image titled Set Up Dual Monitors Step 1

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Identify the computer’s video connection port. On the back of your computer’s CPU enclosure (or monitor if it’s an iMac), you’ll see multiple ports; one of those ports is being used for the main display. Common connection ports include:

  • DVI — A large piece of plastic with many small square holes inside.
  • VGA — A colored trapezoidal piece of plastic with many round holes in it.
  • HDMI — Slim and flat hexagonal port. This is the port found on most newer computers and televisions.
  • DisplayPort — Similar to HDMI, but with an extra thin edge instead of symmetry.
  • Thunderbpt — Available on the back of most iMac screens; Thunderbpt connector has lightning icon below. You can attach an adapter for the above video connections to the Thunderbpt port (such as VGA to Thunderbpt). [4]
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Image titled Set Up Dual Monitors Step 2

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Check the connection of the second monitor. The second monitor must have at least one of the above ports. You don’t have to use the same connection for the first and second monitor.

  • For example, you can connect a first display using a DisplayPort cable and connect a second display using HDMI.
  • In some cases, you can set up a second monitor using a wireless connection. For example, if you want to use your iPad as a second display, you can create a wireless connection between the device and some computers through the Air Display app.
Image titled Set Up Dual Monitors Step 3

Image titled Set Up Dual Monitors Step 3

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Buy a cable or adapter that you don’t already have. If you don’t have the right cable or adapter to connect the second monitor to your computer, you can find them online or at a computer parts store.

  • Especially when you want to connect a second monitor to your iMac, you need a Thunderbpt cable or a Thunderbpt port adapter to connect to the port on the back of the monitor.
Image titled Set Up Dual Monitors Step 4

Image titled Set Up Dual Monitors Step 4

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Connect the second monitor to the computer. Attach one end of the second monitor’s video cable to the port on the back of the computer, and then attach the other end to the second monitor.
Image titled Set Up Dual Monitors Step 5

Image titled Set Up Dual Monitors Step 5

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Connect the second monitor to the power source. You will attach the monitor’s power cord to a power source, such as a wall outlet or surge protector.
Image titled Set Up Dual Monitors Step 6

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Image titled Set Up Dual Monitors Step 6

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Open the second screen. Press the “Power” button

Windows Power

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on the second monitor to power on and receive the signal from the primary monitor. You can now set the display options for the display on Windows or on Mac.

Chiara Corsaro

Chiara Corsaro

General Manager of macVpks

Chiara Corsaro is a General Manager and Apple Certified Mac & iOS Technician working for macVpks, an Apple Authorized Service Provider in the San Francisco Bay Area. macVpks was founded in 1990, is A+ certified by the Business Improvement Board (BBB), and is a member of the Apple Consultants Network (ACN).

Chiara Corsaro
Chiara Corsaro
General Manager of macVpks

In most cases, this is all you need to do. Usually, you just need to connect and then turn on the second monitor and the screen will show up automatically. However, if you want to adjust the settings, click ‘System Preference’ under ‘Display Settings’ to change the settings.

Set display options on Windows

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Image titled Set Up Dual Monitors Step 7

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Open Start

Windows Start

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. Click the Windows icon in the lower left corner of the screen.

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Image titled Set Up Dual Monitors Step 8

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Open Settings

Windows Settings

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. You will click the gear icon in the lower left corner of the Start window.

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Image titled Set Up Dual Monitors Step 9

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Click System . It’s the desktop icon in the Settings window.
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Image titled Set Up Dual Monitors Step 10

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Click the Display tab. You will see this option in the upper left corner of the window. [5]
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Image titled Set Up Dual Monitors Step 11

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Drag the scroll bar down to the “Multiple displays” section. This option is at the bottom of the page.
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Image titled Set Up Dual Monitors Step 12

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Click the “Multiple displays” selection box. You’ll see this box just below the “Multiple displays” heading. The screen immediately displays a list of options after the click.
Image titled Set Up Dual Monitors Step 13

Image titled Set Up Dual Monitors Step 13

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Select display options. You need to click on one of the following options in the list, depending on your preference: [6]

  • Extend these displays — The second monitor will be an extension of the first.
  • Duplicate these displays — Content on the first monitor will also be displayed on the second monitor.
  • Show only on 1 — Content visible above the fold only.
  • Show only on 2 — The content is visible only on the second monitor.
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Image titled Set Up Dual Monitors Step 14

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Click Apply . This is the button below the selection pane.
Image titled Set Up Dual Monitors Step 15

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Image titled Set Up Dual Monitors Step 15

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Click Keep settings when asked. The display settings will take effect after this operation. If you chose to extend the display, you should now see the regular display spread across the first and second monitors.

Set up display preferences on Mac

Image titled Set Up Dual Monitors Step 16

Image titled Set Up Dual Monitors Step 16

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Open the Apple menu

Mac Apple

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. Click the Apple icon in the upper left corner of the screen. A selection list will appear here.

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Image titled Set Up Dual Monitors Step 17

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Click System Preferences… (System Preferences). This is the option at the top of the menu Apple is showing.
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Image titled Set Up Dual Monitors Step 18

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Click Displays . You’ll see a desktop icon in the upper-left corner of the System Preferences window.
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Image titled Set Up Dual Monitors Step 19

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Click the Arrangement tab. This selection displays at the top of the page.
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Image titled Set Up Dual Monitors Step 20

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Uncheck the “Mirror Displays” box. If you want to extend the display to a second monitor, make sure the “Mirror Displays” box is unchecked.

  • If you want both screens to display the same content, you can leave the check mark in the “Mirror Displays” box.
  • Image titled Set Up Dual Monitors Step 21

    Image titled Set Up Dual Monitors Step 21

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    Change the default display. If you want the second monitor to be the primary monitor, click and drag the white rectangle above one of the blue screens onto the second monitor. [7]

    • Advice

    • Repeat the connection process for more monitors if your computer supports it. In this case, you can use three or more monitors.

    Warning

    • If the second monitor has a higher resolution than the primary monitor (or vice versa), you will have to reset the settings of the higher resolution monitor to be equal to the one with the lower resolution. A graphical error will appear if you skip this step.

    This article will show you how to set up a second monitor for your Windows or Mac computer. Using two monitors doubles the display space for your desktop.

    Thank you for reading this post How to Install Two Computer Monitors at Lassho.edu.vn You can comment, see more related articles below and hope to help you with interesting information.

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