Just wanted to follow up with some closure on this one.
Finally got to open the unit up, basically resigned to replacing the screen and just verifying the part numbers.
Undid the screws, and found that the main connector was basically in on only one side. Apparently the side that sends display data, but not power to the LED. The connector's taped down, but it still got knocked loose. I reseated the connector and the tape, hit the power button, and it's back to normal.
So I got to avoid the glossy/matte screen roulette wheel completely.
Thanks again for the earlier suggestions!