Xbox Series S, turns off then suspected mosfet

i bought a faulty xbox series S, cracked it open to find corrosion on the mosfets,Right next to the cpu, under the heatsync, left hand side, i cleaned the corrosion and re flowed the mosfets, and now the fans move upon turning on, beeps then only one spin of the fan then the console turns off, but when it shuts off it makes a buzz, which sounds like a dead HDD, just a low buzz/beep
rince and repeat when i try again
i cant source any mosfets, is there anywhere i can find some?