I have late 2009 27" iMac i5. I have been having so many problems lately I don't know what to do. AppleCare has been no help thus far and ready to get in contact with a supervisor or something until my problems are fixed. First of all, my WiFi is completely broken. I'm fairly technical to say the least and know that it has certainly failed. My screen flickers, you can especially see it when the screen is dim. Definitely becoming a nusense. I've been told this is "normal", yet this didn't happen when I first got the thing. One of my DIMM slots is broken for sure. It always reports back in memtest that it's failed, but in reality, the RAM is good (tested on other machines) and still reports back with a fail. My wireless keyboard has completely gone out. Only about two or three keys still work on it. Before I formatted my computer, I was getting tons of kernel panics to that point where I couldn't even use my machine. While this may sound like a rant, I'm just venting a bit. I am fed up with AppleCare. They have been no help at all. I just want the machine replaced. I don't need a 2011 model, just my same model, but new. This may be wishful thinking, but there are some serious quality control issues I am working with here. Any advice, I will gladly take. This is almost the straw that brakes the camel's back for sure.