I understand dual display is not working proper in your Intel® NUC Board DE3815TYBE.
Let me apologize for any inconvenience this issue may be causing to you.
In order to help you better I would like to gather more information about the configuration you have in the computer. Please attach to this thread the .txt file the Intel® System Support Utility will generate https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility
Please also attach the Intel Graphics Driver Report. This link will show you how to generate it https://www.intel.com/content/www/us/en/support/graphics-drivers/000005848.html
Please run both reports with both monitors connected to the computer.
Are you using any type of video adapter between the computer and the monitors?
Please let me also know the model number of the monitors you are trying to setup in dual display.
To attach a file, you must click “Use Advanced Editor” on the upper right hand corner of the response box, then the “attach” option will appear on the bottom right hand corner of the response box.
Fred, Attached are the two reports you suggested.
I am only using the Intel graphics (no other video adapter).
The monitors are : E176FP (VGA), and Dell 1708FP (DVI input using HDMI to DVI cable).
Thanks for your help.
Thanks for the information you sent to me.
I would like you to try reinstalling the graphics driver.
Please download it from this link https://downloadcenter.intel.com/download/26637/Intel-HD-Graphics-Driver-for-Intel-NUC-Kit-DE3815TYKHE?product=78576
As soon as the graphics driver has been downloaded on the keyboard press WinLogo key + r, then type in devmgmt.msc, double click on Display Adapters -> Intel HD Graphics -> Driver tab -> Uninstall -> Select the check box Delete the driver software for this device -> OK, restart the computer, and then reinstall the driver I provided.
Please also install monitor drivers from the following links:
Dell E176FPf monitor http://www.dell.com/support/home/us/en/04/Drivers/DriversDetails?driverId=YM3D0&lwp=rt
Dell 1708FP Monitor http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=YRY9X
If possible try connecting a HDMI monitor and try setting up dual display.
Let me know if issue persists or not.
I was wondering if you still need assistance regarding the dual display issue you are having Intel® NUC Board DE3815TYBE. In case you still need assistance just let me know.