Recently a friend of mine asked me about NES clone systems. He basically wanted a reliable system with composite video output. After some discussion about the shortcomings of clones (cheaply made controllers, lacking sound/color pallet, etc.), we concluded that an official NES toploader with an AV modification was the optimal solution. During our conversation I warned him that if he wanted me to do the modification, I might make some other aesthetic "improvements." "Cat hair mod" was mentioned.
I scored a reasonably priced ($62, shipped) unit off an eBay seller and began planning what to do with the thing. I'd never done an AV modification on an NES toploader before, but I figured it couldn't be too hard. After a bit of looking around the interwebs I came across some helpful info which basically consisted of a small video circuit and where to grab the mono audio signal. I didn't follow any particular guide, but this guy's work is pretty close to what I did (major differences being that I opted to solder the video circuit directly to the NES's circuit board and I used RCA jacks instead of a headphone jack).
Some guides tell you to steal parts from the original video circuit. My advice is to preserve the original video circuit and just buy the extra parts required for the new one. You can retain your ability to use the RF output and it should cost less than $1.00 in parts to do so.
I contemplated using some cool Megaman art or a random cat face or something like that but, while digging through some pictures I had saved on my computer, I came across the perfect art candidate: Brandon Kusma.
Before settling upon my art selection, I had also considered adding a power indicator LED to the system. I had thought of putting an LED underneath the system, for a nice under-glow, or maybe just a simple red LED somewhere visible, ... but such things do not become us.
So, there you have it: an NES Toploader AV Mod, complete with light up N64 Kid graphics.
Watch the video on Youtube.