[SOLVED] Can any sharp-eyed folks spot what blew on my Seasonic?

[adsoyo]

It was my own fault. I have a custom water cooled PC and was upgrading the GPU. I thought I drained all the coolant out but when I went to lift the PC to reposition it, a little drained out of the top radiator onto the PSU. I had a floor fan pointed at it for 3 hours and didn't see any water drain out when I tilted the PSU in any direction so I thought I was good. When I went to turn on the PSU to circulate the new coolant, it turned on and operated the pump but I heard very faint popping like pop rocks and smelled a battery acid type smell from the PSU. I turned it off immediately and pointed the fan at it for another hour. When I went to turn it back on, there was loud pop and no power. I already ordered the exact same Seasonic Prime PX-750 to replace it and figured I'd take a look at the guts of this original to see what popped. I don't see anything obvious so figured I'd ask you guys what you think failed.

https://imgur.com/DD6w6lp

View: https://imgur.com/DD6w6lp

https://imgur.com/1NFNZx0

View: https://imgur.com/1NFNZx0

https://imgur.com/RXR1aEL

View: https://imgur.com/RXR1aEL

https://imgur.com/39466cB

View: https://imgur.com/39466cB

https://imgur.com/L1SRmQj

View: https://imgur.com/L1SRmQj

 

[Deleted member 362816]

Take a closer up photo of where I circled but it looks like here.

https://ibb.co/L5bDK3v

 

[Satan-IR]

First of all, unless you're a qualified and trained technician, opening a PSU and handling it like that is a very dangerous thing to do. As it can be fatal with the kind of charge those bulk caps can keep for days after power is cut.

Back of the PCB shot some small 3-pin SMDs look burnt maybe SOTs or diodes between the two rectangular ICs.

Also on the left side of the PCB another SMD looks like broken or cracked?

I can't quite make it in that photo. Higher resolution pic of those areas would reveal more.

https://imgur.com/PiZekD0

A qualified repairs person might be able to locate any other damaged component and replace them but those pops you heard means some part of the whole circuit was non-functional with power on and that might have damaged other parts such as ICs etc. Not sure it would be worth the repair. The PSU might work after a repair but it can fail later and take other components with it.

 

[adsoyo]

Here's close ups of those circled areas. Good eye thank you guys!

https://imgur.com/B4Mjq1m

View: https://imgur.com/B4Mjq1m

https://imgur.com/ejV0YSn

View: https://imgur.com/ejV0YSn

 

[Deleted member 362816]

Thanks for the photos hard to say what caused this damage. For sure not really work repairing.

 

[Satan-IR]

Yeah that Weltrend WT7527 is a supervisor IC for PSU protections I guess and that CM6901T6 is a Champion one is either APFC or the resonant controller.

If the SMDs that kind of look blown are part of the protection circuit it might mean somethign went wront and failed and the protection circuit got the blow and saved the PC. Those whitish marks kind of look like they can be residue from a liquid leak.

I wouldn't bother with fixing the PSU.