My iPad 2's screen just stopped working. It just turned black (though I can see that it's on). It can turn it on and off and I can see the difference in brightness. But it doesn't show anythingit's just black. Nonetheless, the touch screen works, as I can unlock it and I can hear the sound. It shows up fine in iTunes, and I tried resetting it to the factory settings and doing everything of that sort, but the screen problem is still there. So I've decided that I need to ask Apple for a replacement since it's stilled covered by the one-year warranty. My question is: do I need to an Apple Retail Store (which is about 50 miles away), or can I just go to a nearby Best Buy, Walmart, or Sam's Club (where the iPad was purchased) to get a replacement?