Question Geforce GTX 1080 HDMI port suddenly not working

[graveyardsoup]

Hi there,

I built my first PC around a year and a half ago, and it's been working great up until this point. I use 2 displays with it, a pretty standard HP monitor (HP VH240a) plugged into the DVI port and a Wacom Cintiq Pro plugged into the HDMI port. Both are plugged into the ports on the GPU (Geforce GTX 1080). Last night I shut my computer down and went to bed, and this morning I woke up, turned it on and it will not detect my Cintiq whatsoever. It recognizes the USB and touch inputs on it, but it will not pick it up as a display. I have tried switching the cables, and even trying another monitor in the HDMI port on the card but it won't pick up anything. My other monitor works just fine. I updated the Nvidia and Wacom drivers and restarted my computer multiple times to see if that would help but still nothing.

Here are the specs:
GPU: Geforce GTX 1080
MB: ASRock ATX (B450 PRO4)
CPU: AMD Ryzen 5 2600
RAM: 16 GB

If anyone has any advice on what the problem might be or what do next, I'd really appreciate it. I'm an artist and this is my first PC build, so admittedly I'm not extremely tech savvy and am kinda stumped by this. This is also my first time posting here so if there's any other info I should add I'll happily do so.

 

[graveyardsoup]

Small update: I've found that the DisplayPorts work with my other monitor, but not my Cintiq. The HDMI port doesn't work with either.