I have a SST-ST45SF-G that has failed on all of the 3.3/5/12 lines, but the ps_on (green wire) is reading 3.7v and the 5vsb (violet wire) is reading 5v. I disassembled it and checked for any swollen or shoddy looking caps but found nothing. No components are discolored, nor do I see any scorching. It all looks perfect. It's a SFX so it's possible i missed something but i looked very closely. No sounds or fan movement either, even when the paper-clip test is done. I tested everything strait from the PSU with no cable attached to make sure that wasn't the cause. The fuse checks out as well. I checked the back mosfet but there may be one more I havent looked at yet i'll have to check. Does anyone with more experience than me (so practically anybody lol) have a probable cause to this failed PSU, or a push in the right direction?
I'm trying to get on a good level with electronics repair but I still have a lot to learn. I got this PSU for practically nothing, but it's very expensive (new) and I'd really like to fix it for my mini-ITX build (also using salvaged parts). I've already replaced an r36 inductor on a FM2A75M-ITX (and created a custom heat-sink for all the inductors since they are famous for burning out (like this one did) on this model mobo. It's more than just saving money though, I want to be able to diagnose things better. I just need a push in the right direction.
I'm trying to get on a good level with electronics repair but I still have a lot to learn. I got this PSU for practically nothing, but it's very expensive (new) and I'd really like to fix it for my mini-ITX build (also using salvaged parts). I've already replaced an r36 inductor on a FM2A75M-ITX (and created a custom heat-sink for all the inductors since they are famous for burning out (like this one did) on this model mobo. It's more than just saving money though, I want to be able to diagnose things better. I just need a push in the right direction.
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