sata failure

Hi guys! I have the following problem and im hoping someone can help me or reassure me in the possible ending of this case. So yesterday i turned off the PC after a little gaming. Today i turned it on and i noticed something unpleasant. My HDD was missing. Not just missing it was completely...

The PC I use is my first build, worked perfectly for a couple years now, but recently, after a power outage (which i think was caused by a transformer explosion based on the loud bang outside), Half of the time when I turn my PC on it won't recognize my boot drive, and most of the time when it...