Using the point end of your plastic spudger, or your fingers, gently pull back the tab holding the fan power cord in place.

Gently pull the cable up and away from the circuit board.

If you look inside the yellow box, top left corner, you will notice a grey color on top of a capacitor. I'm not positive what this substance is but it has a consistency of sticky tack, if you remember playing with that as a kid. When I first opened the power supply the fan power cable was pressed into it rendering it stuck. Gently pull the cable up