Well, not nothing. If I tear apart the whole machine, disconnect the power supply from the logic board and put the machine back together. The mini boots up with out me pressing the power button the fan will spin and run. There is no boot up sound. It ran for 45 minutes once, and roughly 15 another time. I have tried an SMC reset, re-seating literally everything multiple times. Is there any chance it is the power supply? I know it is likely the logic board, but was curious if anybody has had any similar experiences, and or advice. It was working fine last night, and today this! Thanks in advance!