Can you post a picture of the other side of the node board? Since the LED is off, seems it could even be a driver chip or transistor failure, may not even be a LED. If you check with a meter at the LED #26 and see it pulsing in attract mode, I can say it would be a LED. If it is not pulsing at the LED, then another part would be at fault. You should be able to check against another LED on the board to compare it to.