An update regarding the display adapter. I plugged it into my laptop to see if I can get a better idea of what is happening. USB is working perfectly. I have bluetooth off on my laptop, and the Pi-Top keyboard and mouse work great. I also have some touchscreen capability. I can’t control the mouse with the touchscreen, but it is being registered (touching the screen stops the screensaver, or changes the active window.) It also can scroll webpages on Firefox. However, the screen doesn’t display at all. I have tried using both HDMI and HDMI to DP mini. The laptop DOES see the second screen, and unplugging the green cable from the display, or unplugging the USB-C power on the adapter causes Windows to disconnect the second display. I used another display I had to make sure it wasn’t Windows being Windows and that display came right up, with no configuration changes needed.
I have a second cable I built attached to the display adapter to rule out the green cable as being the issue, and it does the same exact thing. I have confirmed continuity on both cables, and all pins on the adpater board, specifically the HDMI port and everything is fine. Could all my issues be due to the logic that is on the hot plug detect pin?