Not much of a tutorial but more of a little tip...
If you have a small, probably green, led on your motherboard indicating the board has sufficiant power, chances are you'd have gotten annoyed at the light it emits at night whether it lights up the room or just looks plain ugly.
Well, this is a simple easy fix!
Here's mine...
All you will need is one capsule style pill, like this...
Carefully open the pill over a bin & empty the contents, so you have two empty halfs like so...
Now, simply place the shorter half over the led. It's a perfect fit!
Still looks a little ugly, so feel free to paint the cap a suitable colour such as black to hide it even better, or a colour to match your theme!