Kanga power LED steady green, no boot

[MattB]

I reassembled my “parts” Kanga this weekend. Plugged it in, hit the power key, nothing. Pressed the reset button on the back and heard a “click” sound from the speakers and the green sleep LED came on and stayed on. Tried holding down the reset button for 30 seconds, still nothing. I’ve opened it up to check all the connections and it looks okay internally. Any other suggestions on what I can try to get this thing to power up?