Nope, no screws or other loose debris. All the wires were undamaged, etc... Other than the brief flash of the blue link light when I plug it in each time, there's no activity. Is there a way the rio can go to sleep and never wake up even if the on/off button pushed and power applied? Maybe resetting the board or something?

Because if it's not that, it seems like the rest of the board isn't getting power since the red led doesn't even light. The power connector seems solid and the same symptom happens if I power thru the sled or via the AC power adapter. Just the brief blue flash.