Hah, yeah, there's no cpu cooler fan, good catch, but considering how clean the inside looks, it's probable Op removed the fan for cleaning, and hadn't reinstalled it yet, too busy freaking out over the red stuff inside the psu.
Almost nobody opens a psu to clean the fan, it'll do a few things like totally void any possible warranty, doesn't do much that a can of compressed air or a vacuum can't do and exposes the cleaning person to potentially lethal amperage (voltage doesn't do much but hurt, anything over 0.5A can stop a heart)