Help with Nintendo Wii U output issues

Hey guys, I have a couple Wii U consoles that have video issues. One of them displays output but it has diagonal red lines and the video have red highlighted parts one the image. The other displays no output at all. I’m not well versed in the Wii U motherboard so I’m not sure where to check and I haven’t found any repair videos for the world that are directed at fixing video output. Any ideas I’m not sure how much these forums are monitored but I would love a video from tronics on how to fix this so others in my position could get our consoles up and running. Thanks in advance for the recommendations!

Happy repairing!