maxipower 400W Dead power supply repair

[khalillll]

The power supply was completely dead. Voltage reached the main capacitors, but nothing after that.
After checking, I replaced the UTC7606D IC to restore the 5VSB.
I using SDC606U as a replacement, but it didn’t work — possibly the IC itself was faulty.
Replaced it again with another UTC7606D.
Result: 5VSB came back, but still nothing — no 12V, 5V, or 3.3V.
After checking again, I think the issue was with the UTC7520D IC.
Replaced it with a WT7520.
Result: PSU fully working again

[CapLeaker]

After the second round replacing the supervisor IC, the PSU should have come on for a split second (fan twitch). What brand and model PSU is this?

[khalillll]

Yes, after replacing the UTC7520D with a WT7520, the power supply is working again and all voltages are present: 12V / 5V / 3.3V

it is maxipower 400W .

[CapLeaker]

Should have read before replacing the supervisor IC. My bad.