Windows 10: Windows shows third monitor as inactive. Cannot get output on more than two displays.

Hi -I have a new computer running Windows 11 Pro 10.0.22621 Build 22621 connected to 3 identical INNOCN 27m2v monitors via an RTX 4090. Windows appears to detect all 3 monitors, but one of them is always listed as inactive. I am able to change which of the monitors is inactive by toggling settings in Nvidia Control Panel i.e., I'm able to get output on any combination of 2 displays at a time, but I am unable to get output on all 3 monitors.Below is a list of all the troubleshooting steps I've taken thus far.Used DDU to do a complete uninstall and clean reinstall of GPU driversTried connect

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HDMI output appears inactive

I have a new HP all-in-one "desktop", added second monitor about 3 weeks ago, worked for about a week and then second monitor went blank. Called HP, they walked me thru a "fix" which worked. A week later, same thing. I did their fix and it worked a second time. Happened again this week, fix no longer works. Monitor is good, cables are good, I'm thinking the HDMI output is bad but don't know how to check. Should it show up in device manager as a separate entry under display output? or is it just part of the display output and not listed separately. I don't have another HDMI device to check the output other than the second monitor.

I have used second monitors for 20 years and this is the first time anything like this has happened. HP tech support has NOT been helpful, even tho the PC is under warranty.

 

4870x2 won't display at 1680x1050 at all!

OK. Now I know what ur problem is. Step by step:
1. Go to Catalyst Control Center
2. Click on the word "Graphic" right on top left corner. It will display drop down menu
3. Click on Display monitor and will see the list of monitor at near bottom
4. Right Click the monitor and select "Configure". It will show up the window
5. There will be 3 option to select. Select the middle one and then click on the tab which show the bar with 15%.
6. Drag the bar to max, and the screen will stretch to the native resolution 1680x1050.
7. Also click the tab with showing RGB drop down list and select the last one (it will change to image quality for pc).
That's it. Good Luck.

 

Windows 10 doesn't show native display for second monitor

Hi,

In order to for your Windows 10 to show the native display for the second monitor, you may revert all screen settings back to default, and see if this resolves the issue. If it doesn't, you may try these steps:

• Press Windows key + P.
• If your monitor settings is on Duplicate, try choosing
  Extend.
• If your monitor settings is on Extend try choosing the
  Duplicate.
• Check the resolution if both monitors are showing the same resolution value.
  

Let us know the result for us to assist you further.

Regards.