The ADP-200ER is an internal switching power supply manufactured for Sony, specifically designed for the CUH-1200 series models of the PlayStation 4 (commonly known as the PS4 Slim or the 12XX series). Its primary function is to convert the high-voltage AC power from your wall outlet (100-240V) into the stable, low-voltage DC power that the PS4's motherboard and other internal components need to operate.
Because these units operate at high temperatures and high voltages, they are prone to specific electrical failures: Haseeb Electronics Adp-200er Schematic