FAN FET (Field Effect Transistor) blown on the PS3 slave board.I'm hoping it's basically the same part and relative placement as a full blown PS3 board.
https://ogrforum.ogaugerr.com/...0#158251952137681860
Being how tiny that surface mount transistor might be, this might be a full board replacement. Ouch $80
https://mthpartsandsales.com/shop/search/results
Keyword search "slave"