So I bought a MacBook refurbished in January of 2009. I hadn't had a problem with it until about a month ago. All of the sudden, it would not come out of sleep mode when I close it. I have brought it to the Apple Store twice already and both times they replaced something in it. I am still having the same problem. I am under warranty and I am going to bring it in a third time. If the problem still remains, will Apple Replace my computer?