Disable power supply LEDs?

Most fans have LEDs embedded (glued) in to the frame of the fans with two conductors running through the frame, just cut one of those wires and no more power to the led. Other than that type of surgery, don't know of an alternative.
 
Just be very careful about cutting wires. Wrong one and its a dead psu. And please do remember to disconnect the psu from the AC wall plug first. Otherwise, it could result in a dead you.
 
Just be very careful about cutting wires. Wrong one and its a dead psu. And please do remember to disconnect the psu from the AC wall plug first. Otherwise, it could result in a dead you.

I will keep that in mind, thanks.