The Most Frequent Multi-Monitor Issues, and Learn how to Repair Them

Multiple monitors offer all sorts of advantages – even over huge single ultravides – from improving productivity to the versatility of placing them on your desk. But the experience is not always perfect. Sometimes you plug in a second monitor and it won't work at all or minimize your game if you accidentally access it.

If you've followed our guide to setting up multiple monitors and you're having trouble, read the list below of common issues with multiple monitors and how to fix them in Windows 10.

No signal

While there may be cause for concern about not sending a “signal” to your new monitor, this is probably the easiest problem to fix. This simply means that the display is powered but does not receive any visual data. There are a number of reasons why this happens, and many fixes that you can try to clear up.

Force Windows to recognize your monitor – Windows may not have recognized the connection of your second display. To force rechecking, right-click on the desktop and select Display Settings from the pop-up menu that appears. In the window that opens, click the Detect button below the display diagram.

Turn the screen off and on again – Some connection types do not like hot swapping while a monitor is on. Switch the display off and on again. This can be all that is required to recognize the video feed and display it correctly.

Check the cable connections – A loose cable can cause no signal errors more often than any other problem. If they appear to be well secured, unplug and plug them back in to make sure.

Check the correct entry – For monitors with multiple input options, you have to manually select which cable (port) you are using, e.g. B. HDMI 1, HDMI 2, DisplayPort etc. Use the buttons on your monitor to scroll through these “channels” and select the correct input from your PC.

Change data cable – If you're using an older cable standard like VGA or DVI-D, you may want to try a newer alternative like HDMI or DisplayPort. You can also try using a new cable if there are old problems (bent pins, a short exposed wire, etc.).

Change the graphics port – If you are using a dedicated graphics card with multiple output ports, switch to a different port. Sometimes the ports themselves can break or be damaged in some way. You just have to switch to another one to fix the problem.

Update your drivers – Windows 10 supports multiple monitors by default, but your current setup may not be configured correctly. If you make sure that you are using the latest graphics drivers for your system, problems can sometimes be fixed without signal errors.

If you're still having problems with the additional monitor, check if it works by unplugging the primary screen and rechecking the steps above. If this is the case, you should run it as the primary display until you have identified the basic problem. If it does not, contact your dealer or manufacturer to discuss a return or replacement.

Wrong resolution

Windows 10 change display resolution

If you add a new, higher resolution monitor to your system and find that it is not displaying properly, you may be borrowing settings from an older screen or simply trying to customize your primary screen.

Step 1: Right-click on your desktop and select Display Settings from the pop-up menu that appears.

Step 2: The Settings app opens with the display field loaded by default. Click the secondary display shown in the diagram.

Step 3: With the secondary screen highlighted, scroll down to Scale and Layout and click the drop-down menu under Display resolution.

Step 4: Choose a screen resolution that works best for you. Windows 10 describes one of these resolutions as "recommended" based on the hardware of the display.

If that didn't work, make sure your monitor and graphics card can run at the resolution you chose. If you're still having problems, update your graphics drivers.

Wrong refresh rate

Change Windows 10 update rate

If your monitor is set to an incorrect refresh rate, you will see a "No Signal" error. This means that the PC outputs a signal that the display simply cannot process, so you have to manually adjust the output in Windows 10.

Step 1: Right-click on your desktop and select Display Settings from the pop-up menu that appears.

Step 2: The Settings app opens with the display field loaded by default. Scroll down and click the Advanced display settings link under Multiple ads.

Step 3: In the following screen, click the drop-down menu under Select display and select the problematic monitor.

Step 4: Under Display Information, click the Display Adapter Properties for Display # link.

Step 5: In the pop-up that opens, click the Monitor tab.

Step 6: Under Monitor Settings, use the drop-down menu to choose a different refresh rate.

You can use the Testufo tool to check the update rate at which your monitor is running.

Duplicate or expand

There are several ways to display content on two screens, but duplication is often the default. If your second display just copies the desktop instead of expanding it, you can change this view as follows.

Step 1: Press the Windows + P keys to load the project menu.

Step 2: Select the Expand option. You can do this by moving the mouse up or down with the arrow keys and pressing Enter or pressing the Windows + P keys to scroll through the options.

Alternatively, you can take the long way:

Step 1: Right-click on your desktop and select Display Settings from the pop-up menu that appears.

Step 2: The Settings app opens with the display field loaded by default. Select your secondary monitor shown in the diagram.

Step 3: With the second screen highlighted, scroll down to Multiple Ads and select Extend desktop to this ad from the drop-down menu.

Step 4: Go back to the diagram and drag your second monitor to the left or right of your primary screen with the mouse.

The same processes can be used for duplication if you prefer.

Games are constantly minimizing

If you find that your games are getting smaller as you play on a single monitor, you may accidentally click in the area of ​​your second display. Some games do not lock the limits of their full screen window. So when you move to the edge of the screen, your pointer can move to the second window.

Clicking will bring up the second screen or whatever, minimizing the game. This is particularly problematic in games without a mouse pointer such as first person shooters. Here are some ways to fix the minimization problem:

Check your in-game viewing options – If you are playing in windowed mode, switch to "full screen" instead as your mouse will be detected. If that doesn't work, switch to Borderless Window mode. It won't prevent your mouse from switching to the other screen, but it can prevent the game from minimizing when it happens. You just have to click in the game window again.

Use a third-party app – With applications such as the Dual Monitor Tool, you can lock a mouse pointer on a specific monitor. Remember to unlock the mouse when you're done.

Turn off the second screen – It's a little drastic, but if you turn off the second screen when playing games you don't need, you won't be able to drift into this expanded area while playing. Simply press the power button on the display or press the Windows + P key and select the PC Screen Only option.

After your multiple monitors all work properly, make sure you get a good background image for two screens.

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