Dead silence. The standby voltage was missing.
He reassembled the PSU, plugged it into the PS3 motherboard, and connected the AC cord. This time, when he probed pin 5, the multimeter sang: 5.0V steady. Pin 7 now read 3.3V. The beast was alive. ps3 fat power supply pinout
First, he tested the PSU on its own. He plugged the AC cord into the wall (carefully—he knew the primary capacitors could hold a lethal 380V charge). He probed pin 5 (5VSB). Nothing. Pin 7 (PS_ON) was supposed to be a high signal (3.3V) when off, and ground when on. It read 0V. Dead silence
The fan whirred to life. The green light shone. The Sony logo appeared on his old plasma TV. This time, when he probed pin 5, the multimeter sang: 5
Leo was a hobbyist electrician, not a console repair guru. But he knew the difference between a motherboard failure and a power supply issue. He flipped the console over, removed the 27 screws (he’d counted), and lifted the RF shield. His eyes went straight to the power supply unit (PSU)—a sealed metal cage of mystery.
The dust on the workbench was the first sign of neglect. Leo hadn’t touched his old CECHA01 PlayStation 3 in nearly a decade. The "fat" model—chrome trim, card readers, the whole retro behemoth—sat like a black monolith, its once-glossy finish now a spiderweb of fine scratches.
Leo desoldered the bulging cap—a cheap 105°C unit from a Chinese factory. He replaced it with a Japanese 330µF, 16V low-ESR capacitor he’d salvaged from an old computer motherboard. It was a tight fit, but it worked.
