Windows 10: Second monitor is detected but nothing is displayed, unless I combine monitors

Hi,I have a laptop Dell with Windows 11 installed. I connected the laptop with two external monitors. The monitors are identical Phillips 242V8 monitors. Up until early this month everything was working fine, let me stress that. One of the external monitors is connected via HDMI cable, the other via the DisplayPort mini cable. The current situation is that the HDMI connected monitor works fine, while the DisplayPort connected monitor is detected by Windows but the screen is displayed as a blank black screen. Even the monitor's built-in menu's are blacked out pressing buttons on the monitor sh

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Second Monitor

I connected a monitor to my Inspiron Laptop. The second monitor displays the same info as the lap top. When I go to settings it will not detect the monitor. I have upgraded all the drivers. Any suggestions?

 

Windows 10 is not detecting my second monitor after the upgrade.Monitor display is there on boot up, and is listed in device manager, but is not detected when setting up displays.

Windows 10 is not detecting my second monitor after the upgrade. Radeon 4800 video card. Monitor display is there on boot up, and is listed in device manager, but is not detected when setting up displays.

Changing the title

Old title – Dual monitor issue.

New title – Windows 10 is not detecting my second monitor after the upgrade. Radeon 4800 video card. Monitor display is there on boot up, and is listed in device manager, but is not detected when
setting up displays.

 

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.