Xbox one 1540 . I need a idea of narrow downing my problem

So my xbox one has me scratching my head. It wouldn’t turn on at first. My power brick was bad so I got a new one. The new one works on my other console but not this one. I tried cleaning the system and pressed the eject button on repeat which turned it on for a minute but it shut of after 5 seconds or so. What should I check next? Any ideas at all to help me narrow it down?

Hi, try checking the mosfets or if there fine just test the all board with a multimeter?