Windows 10: Second monitor not recognized

On an older Dell laptop i clean reinstalled windows 10 build 19041.572 on a new larger ssd. it is attached to a tv with hdmi as a second monitor which was working as expected after the update. I got it all set up but could not get it to allow me to start up without logging in. No check mark was present to disable that when i ran netplwiz. i ran the reg edits found in the tutorials to disable lock screen and to disable require password on wake up. then i restarted. it goes directly to the desktop now without login or welcome screen. but the second monitor is not recognized by windows. the computer makes a chime when the second monitor is plugged in, suggesting the computer recognizes its presence, but does not appear in device manager nor on the display page of windows settings.
Any further information needed will be gladly supplied.
Any ideas on how to troubleshoot this problem are welcome.
thanks.

:)

 

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Windows may not recognize another external display device if the display drivers are outdated, or that the monitor is turned off or not plugged in correctly, etc.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 10 Won't Recognize Second Monitor Via HDMI

Hello,

I would suggest you to refer to the suggestions provided by
“Karthik Vengaloor” replied on May 19, 2013 in the Microsoft Community link and check if that helps.

windows 8 will not recognize my second monitor

Note: The above steps holds good for Windows 10 as well.

I hope this information is helpful.

 

Issues while installing a second monitor in Windows 10

Really? I get a canned answer and nothing else? I posted that I had tried everything that I could find posted online. I did read the post that Andre suggested multiple times prior to posting this request for help. None of it helped.

My computer does not recognize that there is a second monitor is plugged in. The small step of changing the settings so I can put stuff on the second monitor ISN'T the issue. I am not that dumb. in the device manager there is only the single monitor listed
at one point there was a unknown device listed but my computer did not know if it was a monitor or a printer.

There has to be someone out there that knows how to fix this

Please Help