Won’t turn on, or orange light on power brick

I work at a repair shop and a customer came in saying his Xbox won’t turn on. The power brick is orange and when I press the power and eject button there is a very soft “ding” but no lights turn on anywhere and the consoles power brick stays orange the entire time. This is the second power brick I have tried. I did also take it all apart and clean the entire console and apply new thermal paste and still nothing.