I cannot get my 3 monitors to work with my duel HDMI and DP display ports. Both cables are DVI-D at the monitors. Only HDMI port works. The DP port on the NUC doesn't appear to register that anything is plugged in. Any ideas on how to get both ports (HDMI and DP) working? And thank you.
You may have to connect an adapter that converts from DisplayPort to HDMI and then a dongle to convert from HDMI to DVI. There are adapters that combine this functionality, such as: https://www.amazon.com/dp/B07J4WQ2H4 or https://www.amazon.com/dp/B00H11PXVW (depending upon the DisplayPort connector offered).