Hmm... That's an theory I haven't thought of. Any suggestions on what could cause it?...

Yup, the P6 series is an more efficient drop-in replacement for the E6. Now before I order the MOSFETs from TME I need to troubleshoot the current sensing part.

EDIT: Supervisor IC is on the fan controller board.
Useful link: https://www.techpowerup.com/review/corsair-rm750/4.html

I believe the IPP60R190E6 (TO-220 case)....

Order of solder wicks finally came and I found the culprit for the short on primary DC side.
One of the primary MOSFETs went short. Luckily it was only one so the damage should be minimal, but just for sanity I'll need to replace all 3 60R190E6 MOSFETs.

Now here's my question, what are the equivalents to 60R190E6​ inifeon MOSFETs? I can't find any online.

Quick update:
The resistance dropped to 5ohms on both the positive and negative outputs of rectifier and on gate and drain of primary MOSFETs. My idea is to remove the rectifier and if that doesn't fix it remove those MOSFETs (that's where the burnt smell is). Hopefully only one went bad and not anything else...

Nobody is gonna belive this, but when I was going outside to take better pics of it, the corner of the PCB (near the primary MOSFETs) had shorted against the case and now I have 10ohms between positive DC and negative DC on the diode bridge rectifier in circuit, 31 ohms between Drain and Source on all of primary MOSFETs. There is also an burning smell inside.

Okay, I have done reverse engineering on the parts which were exposed and I couldn't find any big resistors which represented current shunts.
Here are the pictures.

Any ideas?...

Hi,

While back I got this Corshair RM750 PSU from a friend which said it was broken. Plugged it into my bulb protection and turned it on. Was greeted with two 60w bulbs turning on (barely at max with PSU generating the voltages. I thought it was the APFC needing more current so I removed the bulb protection and plugged into my wall socket.
All the rails were fine, all generating the correct voltages when turned on.
Now, I have plugged in an known good board (intel i7 0th gen with iGPU, nothing else) and pressed the power button. Nothing happened besides the 5vsb LED onboard...