Brian, same issue here. I replaced capacitors on my brick last year and works on another console. I have tried numerous reset options as well. I opened up and cleaned dust out with air compressor and 99% isopropyl alcohol. I also replaced the thermal paste on the processor and removed old paste carefully with alcohol. It still does the same thing like yours above. Turns on, fan turns on, no display, then turns off within 1-2 minutes. None of what I did above changed it, so decided between replacing motherboard or hard drive. I have my Xbox connected to external USB SSD, but still no avail. Not sure if my external had the OS on it though.