Just brought it to a shop and they used one of their own powersupplies and lo and behold...... The moment it was plugged in, the light was KILLED on that wire too. The machine started though. So they think it is something in the computer, shorting out the plug. He thinks he will now have to get that plug replaced since it doesn't light up any longer for the machine where it was originally plugged in. I hope this has to do with the light and not the logic board.....but I had to leave the Ti there anyway. I only had 'til June left on AppleCare so this was good I discovered it.