Windows 10: Unable to make Dell monitor as Main display

I have a Dell monitor and a HDTV (720) connected to my Windows 10 computer.
Dell is horizontal - DVI
HDTV is vertical - HDMI
When I turn on the computer and monitor is ON, Windows sees it as Display 1. Unfortunately when I turn on the TV, Windows assigns #1 to TV!!!! Rather than monitor, which is really infuriating . Even though my monitor is set as the "Main Display" When I try to change to clone displays Windows takes orders from the HDTV and tries to switch view on My main display from horizontal to vertical instead of forcing the TV to display horizontally on vertical screen.
I know it might seem very odd, but I need this for my MAME dual screen setup. It used to work correctly on Windows 7 and even on Windows 10 , but at some point something got messed up.
On top of that MAME won't load correctly. All versions hang when launched. Also because of the wrong order MAME was showing settings screen on wrong monitor when launched. All because of the wrong order. And I know it's not MAME but Windows, because MAME works just fine when only one screen is turned on. HDTV is mounted vertically, but I want it to display horizontally on Vertical panel in cloned mode. Mame can display both screens that way. On the Horizontal I can have game displayed horizontally and then on the vertical it will clone the same display but horizontally. So clearly it can be done and handled, just POS Windows refuses to do it right.
What can I do? All I find is how to change the monitor I want to be the "Main Display" while I need the main display to be #1 not #2 and that I cannot change!


How does Windows allowing to take priority on 720 display!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!??????????????????????????!!!!!!!!!!!? It's absolutely ridiculous!

I have so many issues with displays and how Windows handles it it's not funny! Even my main computer I have 2 monitors, VR and HDTV connected and when I turn TV on it turns off VR and monitors for a moment and then jumbles applications and throws them all over the displays and of course COMPLETELY rearranges order of the displays. Again all of a sudden my #1 is no longer number 1!!!!!!!!!!!!!!!!!!!!!!!


FIX IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

FIX IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


I AM SO ANGRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!




***Modified title from: I NEED MY MAIN DISPLAY TO BE #1!!!!!!!!!!!!!!!!!***

:)

 

Unable to extend monitor display

Hi Jay Jap,

thanks again for your reply.

I checked the screen resolution settings through windows and then through the Nvidia graphics cards.

Windows detected both monitors but Nvidia settings didn't.

I downloaded and installed the Nvidia drivers again and it's working fine. Simple solution, not sure why I had to install the drivers again? But thanks for your help, your suggestion to check if the monitors were being detected prompted me that it had to
be a graphics card issue.

 

Setting Up 3 Monitors on a Dell

Hi pmuldoon,

Thank you for posting your concern on Microsoft Community Forums.

You need to have a Port replicator depending on the model. Because some monitors supports 3 monitors and some needs to have port replicator to connect 3 monitors. However, I suggest you to follow the below steps, and check if that
helps.

Method 1: Update drivers in Windows 10

I also suggest you to update the drivers, follow this article on

Update drivers in Windows 10, and check if that helps.

Method 2: Follow the Dell article on Multiple monitors.

I suggest you to follow the Dell article on Multiple monitors, follow the article on

How to Setup Multiple Monitors in Microsoft Windows 10, and let us know the results. You can also refer the article on configuring 3 displays, follow this article on

How to configure three (3) displays on a Dell Latitude Notebook with Intel HD 4x00 Graphics

We await your response.

Regards,

 

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