Came back from a weekend visiting my son and my Dell would load the Dell logo then go to a black screen.
This is what worked for me.
Unplug all the cords, USBs, Display Ports, HMDIs and the desktop immediately came on. One of my monitors had been unplugged from the power source, so I guess that was causing the BSOD for me.
Of course it could be something more serious than mine situation, but hopefully it is not and this fix is your solution too.