Windows 10: New monitor, old computer?

I have an older computer that I haven't updated in a long time. I recently bought a monitor that connects to the computer via DisplayPort or an HDMI. Plugged the DisplayPort cable into the computer and the monitor says no input connected. My guess is the video card is outdated- is that right, and how do I fix?

 

Windows 10 refuses to boot without the old monitor.

Hi,

To address your issue with connecting a new monitor, please perform these steps:

• Plug in the old monitor.
• Uninstall the video driver, go to Device Manager > right-click on the video driver >
  Uninstall.
  
• Unplug the old monitor, then connect the new one.
• Turn on the computer, and Windows will attempt to reinstall the driver.
  

Update us on the result.

 

new computer displat will not fit tv/monitor

Hi,

There could be a difference in settings or drivers between your old and new Windows 10 computer. For example, the build of your old computer is different to your new one, or it could also be the monitor itself. Can you provide us the answers to these questions:

• What was the build of your old computer?
• What is the build of your new computer?
• Did you notice some changes on the settings of your computer aside from the aspect ratio?
• Have you tried to change the settings of your monitor?

We're looking forward to your response.

 

Windows 10 refuses to boot without the old monitor.

If you're still having issues with the new monitor, you may try these steps:

• Connect the new monitor.
• Turn on the computer, once it shows a loading circle, press and hold the power button. Perform it three times.
• When the computer boots up, click on Startup Repair.
• Click Troubleshoot > Advanced options >
  Startup Settings.
• Press 3, to enable low resolution video.
• Once you're log in, you may set up the display resolution.

Let us know how it goes.