I've had my DS for about two years (give or take a few months), a few weeks ago black lines started to appear on the top screen and eventually dissapeared for about two weeks, but today the top screen went black. I could see the top screen, but theres no light. So I tried fixing it by making the light brighter, but then it shut off and when I try to turn it on the bottom screen flickers and the whole ds shuts off. I think it might be trouble with the wires connecting with the screen. I also have a DSTT but I don't think it has nothing to do with it since I play my DSTT with my brother's ds as well :/