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HP Desktop PCs - Using Two or More Monitors with One Computer (Windows 10, 8)

This document applies to HP and Compaq Desktop computers with more than one video output connector using Windows 10 or 8.
This document explains how to connect and set up a television (TV) or a monitor as an additional display.
Before you begin connecting additional monitors to your computer
Make sure the computer has at least two video connections: one for the main monitor, and one for the secondary monitor or TV. Many HP and Compaq Desktop computers come equipped with two video connections.
 note:
If you must add a second video card to your computer to gain another video connection, make sure both video cards use the same Windows 10 or Windows 8 compliant (WDDM) driver. One way to ensure this is to use the same video card model for both video connections.
Connecting a second display to your computer
To connect your TV or second monitor as a second display, do the following:
Extending or duplicating the desktop onto a second monitor
Extending the Windows desktop or work area expands the work area across both displays. This configuration is most commonly used to get more workspace. People usually take advantage of the extra workspace to view different applications on different displays.
Duplicating the desktop displays the same (Clone) image on both displays. This configuration is most commonly used for presentations. The presenter works from a smaller monitor while the audience views the presenter’s work from a larger monitor, TV, or projector.
Use the steps in this section to configure Windows 10 or 8 to use the additional display(s) for presentations or for more desktop space.
Tips for multiple displays
After attaching an additional display, you can use these tips to enhance and personalize your display environment.
Configuring the display with the display driver
Configuring the display settings to presentation or duplicate (clone) may require special drivers. At the time this document was written, HP and Compaq computers are installed with ATI or NVIDIA video cards. You can refer to the following two procedure examples to learn how video technology software can be adjusted for a presentation environment in Windows 10 or 8:
 note:
If the video technology used on your computer is different from what is shown below, or you are unable to find the setting for presentation mode, refer to the video technology manufacturer's website for more help and information.
Video card
Procedure
ATI
  1. Right-click an empty space on the Windows desktop, and then select ATI Catalyst Control Center.
  2. Select Basic setup and click Go.
  3. Select Clone, and then select the resolution.
  4. Click Finish.
AMD
  1. Right-click an empty space on the Windows desktop, and then select AMD Vision Engine Control.
  2. Under Desktop and Displays, to extend the desktop, click Arrange Desktops and follow any onscreen instructions.
    or
    To clone or duplicate the desktop, click Change to Duplicated and follow the onscreen instructions.
NVIDIA
  1. Right-click an empty space on the Windows desktop, and then select NVIDIA Control Panel.
  2. Click Display, and then click Change Display Configuration.
  3. Select Clone, and then click Apply.
Troubleshooting TV setup as a second monitor
If you encounter problems when trying to connect a TV to the computer, try the following items:
  • Turn on the TV before turning on the computer.
  • To get sound from your TV, it must support sound through a straight through HDMI connection (no adapters) or a separate audio cable connection.
  • Certain display adapters need to have TV set as the primary display adapter before it can be recognized at all. If the computer is not detecting the TV as a display device when the computer is turned on, set TV as the primary display device in Windows and restart the computer.
  • Use only one video source per display device. Do not connect two cables to the same TV or monitor unless it supports picture-in-picture, and only if you want to use that feature.
  • TVs require their source setting be changed to the video source that the video card is using. Go through the available source connections by pressing the source button (or similar) on the TV's remote control. You should see settings similar to: Input 1, HDMI 1, or S-video. This can vary depending on the type of TV you are using. If your TV does not have this capability, you will not be able to use it as a second monitor without using special video signal processing (not covered in this document). For more detailed instructions, consult the manual for your TV.
  • If making the connection using a coaxial or S-video connector, set the desktop screen resolution to 800 x 600 (or less).
  • After changing the display resolution in Windows to the best possible resolution across devices, you might need to adjust the aspect ratio on some of the televisions/monitors to scale the image to the screen.
  • For standard analog signals, a TV accepts either a PAL (Europe) or NTSC (North America) signal, depending on the country it was made for. Make sure that the signal format of the TV matches the signal output that the card produces (for on-board TV-output, this setting can be changed in the BIOS).

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