The objective of this project was using the tv out from my gopro hero 2 whitout drilling a hole through the waterproof case.
So I decide to weld the wires direct in the main board.
It took a while until I find out that it was necessary to simulate that there was a plug for it to works. So I used a toothpick to trigger the mechanism, and it works fine
There are 4 screw inside the battery chamber, there is a plastic glue in what looks like a heat sink inside the gopro, just use a little bit of force to remove it.
Once you remove de back plastic of the gopro, now is time to remove the front.
There are 3 screws for this step, to on the rigth and one in the left near the tv out connectors. Unscrew it and its done.
Now you need to weld the wires like it was the 2.5mm jack.
Use a multimeter to check the right position to soldering the wires.
Once done this step, plug the toothpick to simulate that there is a 2.5mm plug and you may use the TV Out.
Sorry for not posting the full pictures, but i didn't take them for a step by step, maybe in may next project.