Wii U display is static when using hdmi output

Hello, my Wii U has had an issue with the hdmi output where the display is this glitchy static. Is there anyway to fix this? I know 100% that it’s not an issue with my hdmi cable or the tv since I’ve tried it on a different tv with a different cable. The gamepad display is perfectly fine it’s just the tv display that’s like this. I’ve switched it to the AV output and that works, but I would rather have it display in higher resolution since it’s a little hard for me to see when I’m playing on the AV output. I remember playing it around a year ago and it was fine, and I haven’t touched it in the time in between. So I’m not sure why it’s suddenly like this. Is there anything I can do to fix it or am I stuck using the AV output? Thanks!