Windows 10 does not recognize my second monitor

I've used two monitors for years. Both Samsung SyncMaster 2494. Monitor 1 is attached with a VGA cable that uses a VGA to DVI adapter to plug in my Dell Optiplex 7101 DVI  port. Monitor 2 uses a VGA cable to plug into the Dell 7010 VGA port. The graphics card is an AMD Radeon HD 5450. 

I took Monitor 2 and used it to work on another computer yesterday. This morning I re-attached it to the  VGA port on the Dell 7010 and there was no display. Using Display Settings I can see Monitor 1 but no other displays can be detected.

I am not using Windows basic video.

I've rebooted.....no go.

I've uninstalled and reinstalled the AMD display adapter drivers...no go.

I've uninstalled and reinstalled the monitor drivers...no go.

No new Windows updates were recently downloaded.

I took Monitor 2 and plugged it into the other computer using a VGA cable and it works fine.

Does anyone have any idea on how to fix this?

 

Question Info


Last updated April 13, 2019 Views 10,347 Applies to:
Hi David,

The issue you're experiencing might be due to a variety of reasons but possibly on your PC's BIOS settings.

Having that said, it would be best that you contact your PC manufacturer for further assistance.

We're just a post away should you have further queries.


Regards.

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Could you please list the "variety of reasons"? Also, what changes might be need in the BIOS?

Thanks,

David

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I went into BIOS and found that multi-display was turned off in the video menu. I enabled it and restarted but my second monitor is still dark.

Windows display still does not detect another display.

David

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What happens when pressing Windows key + P and trying to select another projection? Are you able to see the Extend option?

Hoping to hear from you soon.

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Nothing happens.

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Thank you for the update, David. Usually, Windows 10 can't detect the second monitor due to the incompatible display driver. We recommend that you update your display driver and check if the issue persists. To update the display driver, download the latest one from your monitor manufacturer’s website.

If you need further assistance, let us know.

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"I've uninstalled and reinstalled the AMD display adapter drivers...no go.

I've uninstalled and reinstalled the monitor drivers...no go."

Any other ideas?

Thanks,

David

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Are you using the updated versions of your device drivers? If so, and the issue persists, we suggest that you install the driver in compatibility mode. You may refer to the steps below:

  1. Right-click on the driver and select Properties.
  2. Select Compatibility tab.
  3. Place a check mark next to Run this program in Compatibility mode and select the operating system accordingly from the drop-down list.
  4. Let the driver install, and then check the functionality.

Keep us updated with the results.

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How do you know updates weren't 'downloaded'?

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Today I hooked monitor #2 back up to my PC. With no intervention on my part, #2 came back to life. That's the good news. The bad news in that the resolution of monitor #1 is 1920 x 1080 and #2 is much less. How can I make both monitor resolutions the same?

Thanks,

David

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