I had a power supply that was driving me nuts, so I tried one hardware trick and one software trick to see if I could fix it. Warning: opening power supplies is dangerous and to be honest, I found the software trick to be more effective anyway.
Power Supply Tester
https://amzn.to/3JZI0Tm
Blinker fluid
https://amzn.to/3PZ3bZE
Bulk Coil Whine Fixer
https://amzn.to/44jeAaR