Step 1: The Teardown.
it down, because there are numerous sources online on how to go about it. You'll need a gamebit driver for the unique screws Nintendo uses, I used the plastic pen method. (heat plastic pen and press onto screw making it into a driver)
Once you've stripped down to the board, you'll see there are 12v, 5v, and 3.3v rails marked throughout the board.
Step 2: Replace Stock LED, and Add Lights of Your Choice.
I then soldered a clipped piece of LED leg onto the ground rail, giving myself a common place to ground my blue lamps, with their source being from the12v rails on both sides of the board. I placed two on each side near the vents, two under the cartridge slot, and one behind each controller port. To make light cast more evenly, I applied a coat of hot glue around each bulb to diffuse and secure them in place.
Step 3: Paint Whatever Color You Desire. (optional)
The controller is simply parted down, masked accordingly and painted to match the console.
Step 4: Reassemble, Test, and Modify.
Step 5: Things to Keep in Mind.
Do not modify board at any point while it is on, you'll want to test it frequently during the build, but if left on during, you risk shorting out a crucial rail that a lot of people have noticed frying the entire A/V system.
Insulate, and fasten your connections. hot glue is my go to electronics adhesive, its fast, secure, insulating, and best of all, you're able to easily undo it if need be.
I'm sure I've left something out, that will be caught after posting, and I'll make every effort to fix it if need be.