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I recently washed one of my YN568EXii in sea water. It made a pop sound, gave some smoke and so I removed batteries.

I opened it up after I reached home and i see that there's one capacitor blown up. There's no other visible damage. I cleaned the insides.

Thing still boots up but that cap doesn't like it and pops.

Can anyone tell me what capacitor was in this spot? Or is there a schematic available? Or is this pcb spare available?enter image description here

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    I'm no electrician but I'll be honest that board looks highly corroded, considering what a capacitor does I'd strongly urge you to reconsider doing this work.
    – Crazy Dino
    Dec 31, 2017 at 11:42
  • Just FYI, removing the batteries and leaving a speedlight alone for 24 hours can still result in a capacitor holding a >200V charge. I.e., just removing the batteries didn't actually render your flash's capacitor safe to work on.
    – inkista
    Dec 31, 2017 at 23:47
  • Technically, the salt water seems to have discharged it. Sea water is roughly the worst fluid to get into electronics I suspect... I'm half certain the SMD under the top left screw hole has some burn marks next to it too.
    – Journeyman Geek
    Jan 1, 2018 at 1:39
  • Well, the board itself is not corroded, there were deposits that were cleaned. All open metal was tinned so fortunately only rust was on screw heads. There was ~15 days between dipping in water for 2 seconds and opening up. Also, this is not the cap that goes 200V, I believe that one is on the other side of this board (dont know how high this one goes though). After cleaning deposits, board looks feasible, so i could give it a try if I know which part is that. Or I could replace the whole board if I can find it somewhere.
    – GPS
    Jan 6, 2018 at 14:29

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