I think mine always had a blue or purple screen, bought it on launch day. Though I'm not that observant.
I've had a couple of minor problems, may have been the software's fault, even. Zelda crashed once, and for some reason my copy of Beyond Good and Evil won't work with controller port 1 when I start it up, and randomly changes to other controller ports at certain times, like when starting the minigame at the bar.