Hey everyone. Sorry, I posted this question in another thread but wasn't getting a response. I just received my new i7 and it has the high pitched noise when you adjust brightness. It seems like whenever I hear about problems, its with the i7, but maybe thats just coincidental. However, it the i5 does seem less problem prone, I would like to know because I'll just order it instead of a new i7 when i return this one. Thanks.