How to Connect a Laptop to an External Monitor

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How to Connect a Laptop to an External Monitor
How to Connect a Laptop to an External Monitor
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This article shows you how to connect an external monitor to a laptop running Windows or a Mac. Since many modern laptops are able to automatically choose the best video settings once connected to an external monitor, the most difficult step of the procedure becomes that of choosing the correct cable to physically connect the laptop to the monitor.

Steps

Part 1 of 5: Connect the Monitor to the Laptop

Connect a Laptop to a Monitor Step 1
Connect a Laptop to a Monitor Step 1

Step 1. Determine what your laptop's video output options are

Most laptops have only one video out port located along the sides or back. The options for connecting a laptop to an external monitor are typically as follows:

  • Windows systems:

    • HDMI - is a port characterized by a thinned rectangular shape with two rounded corners. It is normally available on most modern laptops;
    • DisplayPort - similar in shape to an HDMI port, but with only one beveled corner;
    • VGA or DVI - VGA ports are colored blue and have 15 holes, while DVI ports are normally black and have 24 holes all aligned on the left side of the port. These are two outdated connection standards that can still only be found on older laptops.
  • Mac:

    • Thunderbolt 3 (also known as USB-C) - is a door characterized by a thinned rectangular shape with the two short rounded sides. Equipped on most modern Macs and MacBooks;
    • HDMI - is a port characterized by a thinned rectangular shape with two rounded corners. It is normally available on MacBook Pros;
    • Mini DisplayPort - is similar in shape to an HDMI port, but with a smaller size and is available on Macs manufactured between 2008 and 2016.
    Connect a Laptop to a Monitor Step 2
    Connect a Laptop to a Monitor Step 2

    Step 2. Check the available video input ports on the monitor

    Low-end computer monitors typically have only one connection port, while modern televisions have multiple input ports to choose from. Normally the standards adopted are HDMI or DisplayPort and the ports are located on the back of the monitor. If your monitor is relatively old, it may have a VGA or DVI port.

    Connect a Laptop to a Monitor Step 3
    Connect a Laptop to a Monitor Step 3

    Step 3. Connect the cable to the video output of the laptop

    Find the end of the cable that matches the shape of the video out socket on your computer and insert it.

    Connect a Laptop to a Monitor Step 4
    Connect a Laptop to a Monitor Step 4

    Step 4. Connect the other end of the cable to the monitor

    Again, insert the connector into the matching monitor port based on the shape.

    • If your monitor requires a different type of connector than the one you find on your computer, you will need an adapter to make that connection. Some adapters have the sole purpose of bridging two connectors of different types. For example, a VGA-HDMI adapter allows you to connect a VGA cable on one end and an HDMI cable on the other. Here are some examples of adapters:

      • HDMI to DisplayPort
      • DisplayPort (or Mini DisplayPort) to HDMI
      • Mini DisplayPort to DisplayPort
      • USB-C to HDMI (or DisplayPort)
      • VGA to HDMI
      • DVI to HDMI
      Connect a Laptop to a Monitor Step 5
      Connect a Laptop to a Monitor Step 5

      Step 5. Plug the monitor into the mains and turn it on

      Connect the power cord to the monitor, then insert the power plug into a power outlet. At this point, press the button Power ignition characterized by the following symbol

      Windowspower
      Windowspower

      If you have had to purchase a signal converter (and not a simple cable that acts as an adapter), you will need to connect the device to the mains

      Connect a Laptop to a Monitor Step 6
      Connect a Laptop to a Monitor Step 6

      Step 6. Select the video source on the monitor

      If you are using a monitor or TV that has multiple inputs, you will need to select the port you used to connect to the computer. To select the video source, press the "Input", "Source", "Video Select" button or something similar on the monitor or remote control.

      Connect a Laptop to a Monitor Step 7
      Connect a Laptop to a Monitor Step 7

      Step 7. Wait for the contents visible on the laptop screen to appear on the external monitor as well

      Once the computer desktop image appears on the external monitor screen, you can proceed to configure the video settings.

      If your computer desktop does not appear on the monitor, go to Method 2 for the procedure for detecting a display using Windows or Method 3 for the procedure for a Mac computer

      Part 2 of 5: Detecting a Display on Windows

      Connect a Laptop to a Monitor Step 8
      Connect a Laptop to a Monitor Step 8

      Step 1. Access the "Start" menu by clicking on the icon

      Windowsstart
      Windowsstart

      It features the Windows logo and is located in the lower left corner of the desktop. The "Start" menu will appear.

      Connect a Laptop to a Monitor Step 9
      Connect a Laptop to a Monitor Step 9

      Step 2. Open the Settings by clicking on the icon

      Windowssettings
      Windowssettings

      It features a gear and is located at the bottom left of the "Start" menu.

      Connect a Laptop to a Monitor Step 10
      Connect a Laptop to a Monitor Step 10

      Step 3. Click on the System item

      It features a computer icon and is visible within the "Settings" screen.

      Connect a Laptop to a Monitor Step 20
      Connect a Laptop to a Monitor Step 20

      Step 4. Click on the Display tab

      It is listed on the left side of the "Settings" window for the "System" section.

      Connect a Laptop to a Monitor Step 11
      Connect a Laptop to a Monitor Step 11

      Step 5. Scroll down and click Detect

      This is the gray button under "More Screens" at the bottom of the screen. This allows Windows to detect your monitors.

      Part 3 of 5: Detect a Display on Mac

      Connect a Laptop to a Monitor Step 12
      Connect a Laptop to a Monitor Step 12

      Step 1. Click on the Apple icon

      Macapple1
      Macapple1

      This is the Apple logo icon in the upper left corner of the menu bar. A drop-down menu will appear.

      Connect a Laptop to a Monitor Step 13
      Connect a Laptop to a Monitor Step 13

      Step 2. Click on System Preferences…

      This is the second option on Apple's drop-down menu. Opens the "System Preferences" window.

      Connect a Laptop to a Monitor Step 14
      Connect a Laptop to a Monitor Step 14

      Step 3. Click on Monitor

      This button has a computer monitor icon. Opens the "Monitor" window.

      Connect a Laptop to a Monitor Step 15
      Connect a Laptop to a Monitor Step 15

      Step 4. Press and hold the "Options" button

      When you press the "Options" button, the "Detect Monitor" button appears in the "Monitor" window.

      Connect a Laptop to a Monitor Step 16
      Connect a Laptop to a Monitor Step 16

      Step 5. Click on Detect Monitor

      It is located in the lower right corner of the "Monitor" window and appears when you press the "Options" button.

      Part 4 of 5: Change Video Settings on Windows

      Connect a Laptop to a Monitor Step 17
      Connect a Laptop to a Monitor Step 17

      Step 1. Open the "Start" menu

      Click on the Windows logo in the lower left corner of the screen. The menu will open Start.

      Connect a Laptop to a Monitor Step 18
      Connect a Laptop to a Monitor Step 18

      Step 2. Open the "Settings"

      Click on the gear icon at the bottom left of the menu.

      Connect a Laptop to a Monitor Step 19
      Connect a Laptop to a Monitor Step 19

      Step 3. Click on "System"

      This is the computer icon in the "Settings" window.

      Connect a Laptop to a Monitor Step 20
      Connect a Laptop to a Monitor Step 20

      Step 4. Click on the "Display" tab

      This option is located in the left part of the "Display" window.

      Connect a Laptop to a Monitor Step 21
      Connect a Laptop to a Monitor Step 21

      Step 5. Scroll down to the "Multiple Displays" section

      It's almost at the bottom of the page.

      Connect a Laptop to a Monitor Step 22
      Connect a Laptop to a Monitor Step 22

      Step 6. Select the "Multiple Displays" drop-down menu

      Connect a Laptop to a Monitor Step 14
      Connect a Laptop to a Monitor Step 14

      Step 7. Choose from the viewing options

      Choose one of the following menu items:

      • Duplicate these screens - the same images will be displayed both on the laptop screen and on the monitor;
      • Extend these screens - the external monitor will be used as an extension of the desktop space. This means that by moving it to the right side of the laptop screen, the mouse pointer will automatically be transferred to the external monitor;
      • Show desktop only for 1 - images will only be displayed on the laptop screen. In this case the external monitor screen will be turned off;
      • Show desktop only for 2 - images will only be displayed on the external monitor. In this case the laptop screen will be turned off.

      Part 5 of 5: Change Video Settings on Mac

      Connect a Laptop to a Monitor Step 15
      Connect a Laptop to a Monitor Step 15

      Step 1. Open the Apple menu

      Click on the Apple logo in the upper left corner of the screen. A drop-down menu will appear.

      Connect a Laptop to a Monitor Step 16
      Connect a Laptop to a Monitor Step 16

      Step 2. Click on System Preferences…

      It is one of the options present in the drop-down menu that appeared. The "System Preferences" dialog box will appear.

      Connect a Laptop to a Monitor Step 17
      Connect a Laptop to a Monitor Step 17

      Step 3. Click Monitor

      It is an icon that looks like a small computer monitor and is located in the center of the "System Preferences" window.

      Connect a Laptop to a Monitor Step 18
      Connect a Laptop to a Monitor Step 18

      Step 4. Go to the Monitor tab

      It is located in the upper left of the dialog box.

      Connect a Laptop to a Monitor Step 19
      Connect a Laptop to a Monitor Step 19

      Step 5. Change the graphics resolution of the laptop

      Select the "Resized" radio button, then choose the resolution you want from those available.

      Remember that it is not possible to select a resolution higher than that of the panel with which the monitor is equipped (such as 4K in the case of a Full HD monitor)

      Connect a Laptop to a Monitor Step 20
      Connect a Laptop to a Monitor Step 20

      Step 6. Change the screen size

      Drag the "Underscan" slider, located at the bottom right of the window, to the left to view a larger portion of the Mac screen, or to the right to view a smaller portion.

      This feature allows you to adjust the image size to fit the external monitor screen perfectly

      Connect a Laptop to a Monitor Step 21
      Connect a Laptop to a Monitor Step 21

      Step 7. Extend the Mac desktop to the external monitor if needed

      If you want to use the latter as an extension of the desktop space, go to the tab Arrangement located at the top of the window, then deselect the "Duplicate monitor" check button located in the lower left part of the tab.

      Using the "Layout" tab, you can also change the position of the menu bar by dragging the white rectangle at the top of the blue box visible in the center of the tab to the right or left

      Advice

      • The DisplayPort, HDMI and USB-C video ports can carry both video and audio signals simultaneously. This means that if your monitor is equipped with loudspeakers (and one of the indicated connection standards) it will be able to reproduce sounds as well.
      • To improve the process of detecting laptop-connected monitors and image quality, you can update system drivers.

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