Corsair HX1200 connected w EVGA molex cable, 12V pin back feeded to 5V. Anybody has experience in this damages repair?

[coinwizx]

The power supply is 2020 Corsair HX1200 modular power supply.

Cause of damage: I connected EVGA molex cable to the Sata port and test it with a ATX tester. Since the pin out on the EVGA is wrong, result in the 12V pin shorted to the 5V pin, in the 12V back-feeded to the 5v port.

Damage: Power supply shorted out, shut off itself internally, damaged the 5v or 3v rail or the monitoring circuitry. The self protection circuit shut off the power supply when power up because it detected some abnormal/defect. I waited a few minutes, let it self reset then try to re power up. It try to power up, fan spin up but immediately shut of. When turn on the power switch immediately on a 2nd attemp, it no respon at all, the fan not spin up anymore. Waited a few minutes and try it again, the same behavios happen, fan spin up and shut off on 1st attemp only.

Help? Seek advice or help from someone who has experience with similar damages or repair this model PSU. What need fix?

[CapLeaker]

As already mentioned:
The fan twitch tells you
A: The primary is o.k to 95%
B: The supervisor IC in the secondary shuts the PSU primary side down, because there is a problem with one of the voltage rails. I am guessing that there is a voltage missing. The supervisor IC is a WT7518 and it has two of them for one reason or another. The 3.3V and the 5V rail are coming from a DC to DC converter. The 12V rail is regulated using MOSFETs…And here I think that somewhere the problem is.

https://www.tomshardware.com/reviews...su,5102-3.html

We really need straight shot, high resolution pictures from top and bottom. Your other PSU in the other thread sounds like it has the same problem.