Do you see a display on first power on, perhaps a boot logo and the initial Windows loading page but then the screen goes blank?
The most common problem with GPUs not outputting a display when in Windows 10 is a frequency sync issue between the monitor and the GPU. When the PC first boots up, it outputs in a low resolution and refresh rate and this often works. Part way through the Windows 10 boot process it detects the maximum refresh rate and resolution of the monitor and switches to this setting. Often you see the logo getting smaller and the screen changing aspect during this process but sometimes this goes wrong and you don't get to see the output at all because the GPU is sending a signal which is at too high a rate to the monitor.
If this is the case, you can try the following:
1) If you have access to a second monitor, try connecting this to one of the other outputs from the PC and see if there is a display on this screen. If so, open the display settings and select the settings manually for the original screen. You can try reducing the resolution and refresh rate manually to see if the image appears. If it does then you know its a problem with this detection process during boot and may need to manually create the correct working profile for your monitor. Sometimes you can find a driver for your monitor and install that. The driver will have all the correct settings for the monitor. Once the changes are made, unplug the second monitor and you should have a working PC with the original monitor.
2) Try booting the PC into safe mode which should run the system in a very low resolution without the main graphics driver loaded. From there, you can uninstall the GPU driver and then try re-installing the latest version driver, even if its the same one you just removed. This process can fix corruption with the GPU driver.
3) Update your motherboard BIOS - Sometimes the BIOS has issues communicating with the GPU and more recent BIOS variants tend to have all the bugs fixed.
4) Try to re-install your motherboard drivers. You can find the drivers on the motherboard vendors website in the support section. Download and install them all, reboot and then do a full windows update. You may need to try the second screen trick as in point 1 in order to be able to do this one.