These caps appear to be intact, but there might be a smear or residue on them.
These caps appear to be intact, but there might be a smear or residue on them.
It does look like a pidgeon flew in and took a dump all over them. It's probrably a leftover from something that happened to the system earlier and just makes it look bad. Solid caps tend to be reliable and able to tolerate stuff rather well. As long as the system is working I'd have to say it's fine - Just what you're seeing is superficial.
Looks like rust on the socket clamp. Its seen some humid days I think.
From this angle, the board is an Intel Extreme Edition one. The electrolytic capacitors appear to be a blend of Nichicon and Samsonex types; they seem fine overall. It’s unclear why the solid caps are intact while others show damage—wouldn’t they be affected if the board had been misused?
I believe I've figured it out. These caps have a very tightly stretched polyethylene outer layer where the colors and numbers are printed. It wouldn't be noticeable on a fresh cap. However, something damaged the polyethylene, exposing the aluminum cap underneath, which has started to oxidize slightly. That's likely what caused the white substance. The caps appear fine, so I'll take the board and apply some nail polish to protect them from further oxidation. Thanks for your feedback!