I was trying to fix my Dad’s PS3 (he recently passed away) nothing was working, so I connected the HDD from the PS3 into my PC. Upon plugging in the SATA cable, the entire PC shut off. I unplugged the HDD, but now when I power on the PC, the fans just run at max speed and nothing else happens. I don’t know how to troubleshoot this problem.
Try unplugging the power, holding the power button for a solid 10 seconds, plugging it back in and turning it on. Feels like magic, but it clears out the capacitors and has helped me in a few Jams. Also, if you haven’t already, unplug the HDD.