R081N

hello! i have done the mod that i found on this page of the atari 2600 jr PAL. I have done a jumper from chromo to luna and soldered the rca cables to luna and audio. And grounded them. But when i start it the screen is all black and no sound. It flashed some coloured stripes first time and some sound then it dissapeared. It seems like its getting some kind of connection though. And the game seems to be on because the channel number is moving the same way as the game when i have space invaders in to the side and down just like the game. Anybody got any idea of what to do? Now the sound worked for a while then it stopped i could see some picture from space invaders bouncing on the screen very little outlines.