I have a 480W Tagan EasyCon PSU and as you can imagine it's not new. When i first got it i still had a socket 478 rig, lol. So anyways a few weeks ago it became noisy so today i took it apart for cleaning (manufacturer warranty long gone) and i found what appears to be light surface rust on 3 of the smaller capacitors. Is that bad?
Are they rusty, or have you got blown electrolytic capacitors? You can tell by the shape of the cylinder - if you clean them off, are the top surfaces flat or deformed upover into a dome shape? If they're flat, they're probably fine - if they're deformed, they've probably blown.