Worrying about dead pixels in portables is so 2005. This year, all the kids fret about cracked hinges. Multiple forum members at game site MaxConsole are stepping forward, saying that their DS Lites have been breaking. Hinge cracks have been reported in Lites from the US, Japan and Europe.
I haven’t used my DS Lite to a great extent, but have not noticed signs of this happening. Some refute that the problem is a big deal, but it could easily lead to larger problems if it persists. It’s actually quite rare to see a Nintendo product with such problems, so that’s strange in itself.