Last night I had strong hopes I would be recording my first gameplay video before going to bed. However, that did not happen.
As of this writing, the screen is working. Most of the buttons work. Except, when controlled by the Pi. When the Teensy and Pi are connected, it appears to create a short circuit. The troubling aspect is that when the Teensy is connected to my computer, no issue there. At least I have a Wii-U style controller for OpenEmu now. 
So the problem is with the Teensy, the Pi, or my wiring. I suspected the wiring first but cannot find an obvious fault. After that, I programmed a new Teensy but did not connect any wires. I get the same behavior by just connecting to the Pi’s USB, which is why I suspect the Pi. Perhaps I damaged the USB controller when de-populating the USB ports. When the kernel driver enables the USB controller, I see the 5 volt rail dip, the under voltage icon comes on (when the screen is connected), and sometimes the Pi reboots. If it makes it to EmulationStation, I can SSH in and see dmesg complaining about overcurrent.
Regardless, I have yet to start editing my video. Even if I could find and repair the fault in the next hour, I would not have time to finish a suitable video by the morning deadline.
I have never captured so much footage while working on a project. Right now my capture folder is sitting at 128 GB (interesting number) with more from yesterday’s SD Cards waiting for transfer.
So that what I captured does not go to waste, my goal is to re-work the project and produce an AddOhms video out of it.
Best of luck to everyone else. I look forward to watching your build videos and seeing who becomes the next Ben Heck.
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