Windows 10: When I connect the second monitor Windows just add the second to the first

Yesterday I bought a second monitor, I plugged it in and everything worked. Today when I booted the pc Windows didn't detect 2 monitor, but just one big with double the resolution. I've tried to uninstall drivers, unplug both monitors and to "Detect" multiple monitor in the section in System>Display but nothing is working.

Thanks in advance.

:)

 

Second monitor not detected after update

Hi Tom,

There are several reasons that could have caused the issue you are experiencing. One of these is the update you previously performed in Windows, either it was not configured properly by the system or the update components were corrupted. Kindly answer the
following questions for clarification:

• Have you tried updating the monitor and display drivers?
• Have you tried to use another user profile to check if the issue re-occurs?

Furthermore, we suggest that you add the other monitor manually. This is to ensure that the second monitor is still connected after the update. Here are the steps:

• Type connected devices and open Connected Devices on the
  Windows Search bar.
• Click Add devices.
• Select the Second screen.
• Pick one of the 3 options: Duplicate, Extend, and the Second screen only.
• The Duplicate option will duplicate the primary display to secondary display.
• The Extend option will unite two monitors so you can use them both as one.
• The Second screen only option will, obviously, disable primary and use only the secondary monitor.
• Once you’ve chosen the preferred mode, save changes.

We're looking forward to your response.

 

windows not recognizing second monitor

Hello,

Windows may not recognize another external display device if the display drivers are outdated, or that the monitor is turned off or not plugged in correctly, etc. For us to isolate the issue in connecting a second monitor in Windows 10, kindly respond to
the questions below:

• Have you made any significant changes to your device prior to the issue?
• Did the second monitor work before?
• Have you tried using the monitor to a different computer?
• What happens if you disconnect your primary monitor and connect the second monitor to make it the main monitor?

We look forward to your response.

 

windows Can't detect my second monitor

Hi Max,

Thank you for posting your query in Microsoft Community.

I understand that you are having a tough time working on the computer.

I will certainly help you to resolve the issue.

• 
  What happens when you try to connect the second monitor?
  
• 
  Do you receive any error code/message?
  
• 
  Have you tried to connect the second monitor on a different port?
  

I suggest you to connect second display using a different port available on your PC and check if the second display works. If second display works in other port, then the possible cause for this issue may be discrete video card driver.


Let us try the following steps, and check it helps.

Step 1: Run the Hardware and Devices
troubleshooter.

Hardware and Devices troubleshooter checks for common problems and makes sure that any new device or hardware connected to your PC is installed correctly.

• 
  Type troubleshooting in the search bar.
  
• 
  Select Troubleshooting.
  
• 
  Select View all on the top left corner.
  
• 
  Click on Hardware and Devices.
  
• 
  Follow the on-screen instructions to run the troubleshooter.
  

Step 2: Update the Display Adapter.

• 
  Press Windows key + X and click on
  Device Manager.
  
• 
  Expand Display Adapter.
  
• 
  Right click on the video driver and select
  Update Driver Software.
  
• 
  Restart the computer.
  

Also, see:

How to: Install and Update drivers in Windows 10

How to add and use a second monitor with Windows 10

Hope it helps.

Let us know the status, we are glad to assist you further.