On the non-isolated side of a power supply - this part is cooked beyond recognition. It appears to be a MOSFET with pins 5-6-7-8 tied together and pin 4 (presumably the gate) has an isolation slot cutout.
I don't have the physical PCB in my hands yet, but I would expect this to be a fairly high voltage area. The unique-ish nature of a 7pin SOIC [pin 3 deleted] should narrow it down along with what appears to be a portion of a logo.
Any guesses, hypothesis, etc would be appreciated.