VIEWSONIC VA2456-MHD_H2 24" 16:9 IPS Monitor (2-Pack without Stand) - Manual (Page 18)

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2-6. Driver Installation (Windows 10 Setup)
In order to install the driver, first connect your monitor to your PC,
boot up your PC (make sure to first turn on the monitor first) and
make sure your internet is available. When the PC has finished
booting up, your PC should auto- detect the monitor.
To ensure auto-detection is successful, go to ‘Advanced Display
Settings’ under your system ‘Display Settings’ (screen resolution)
window. There you can verify your ViewSonic monitor has been
recognized by your PC in the ‘Color Management’ section of your
advanced settings.
VA2456-FHD VA2456-FHD.icm
If your PC has not auto-detected the monitor, but is still functioning,
you can download the driver from ViewSonic website and install it
then restart.your computer and follow the steps above again. It is
not imperative for your computer to detect the monitor for normal
use, but it is recommended.
If you encounter additional problems or have questions, please
contact Customer Support.