Just got my replacement i7 today and everything seems perfect (no yellow screen, debris under the screen, backlight bleed, dog whistle, ect), with the exception that it buzzes when it goes to sleep. The sound comes from the top of the computer, just left of center, so its probably the main power source thats producing it from what I've read. This noise isn't going to bother me, since its relatively quiet and if the computer is asleep, obviously I'm not using it. I just want to make sure that this isn't a sign of problems to come. If the sound is no problem, I think I finally have a keeper!!! Thanks.