I unplugged the HDMI cable from my GPU, removed my GPU and plugged the cable back into the motherboard. Purple line still appears. I also tried switching HDMI cables and it didn't work.Does your board have video outputs? If so, try removing 1070 Ti and see if line goes away. An issue like that is either cable, monitor, or GPU.
There is definitely a reset button. What kind of resolution do you mean? Display Resolution? Sorry again for the late response, I've been finding myself busy lately. What should I do?Seems like it's going to be a monitor issue then. Different cables and completely different GPUs, both discrete and onboard, have the same purple line. Are they any adjustments for monitor itself, such as a reset, or changing resolution, ect.