sunplus pmp modding.

[robotswillkillyou]

so i bought this mp4 media player [here] because it has the option of playing nes games, but the controller is horrible and makes playing the games impossible. so i wanted to mod it in to a new case and wire on a nes controller. but im not 100% how to go about it. i took the mp4 player apart and the buttons that it uses are simple dome shapes of metal, held on by tape. that when pressed down connect the outer ring with the middle ring. my guess is that the insides of the circles are the the connection and the outer rings are grounds??? i tried to just solder some wires straight from the iner ring and outer ring to different sides of the buttons on the nes controller board like in the diagram... but it just made so that none of the buttons on the mp4 player worked.. can anyone help me out?

[zack247]

if you can get the solder off, and you have good enough soldering skills, you can do it. re attatch the original buttons, and expose the traces on the pcb leading to those buttons. the just wire it up to the nes controller. it should work after that.