Hey, man. I finally got around to trying that last solution. It didn't work though. I'm sure I followed everything correctly.
At the end where it says "if it does not load, then reload a firmware update", it did not load. So, I reformatted a card, put the firmware on it, tried it again, but no good. I'm back to where I was.
Should I try all of that again? Is the "last resort plan" difficult? I don't think I care about the serial number lol.