I'm having several problems with my current unit, 17" MBP Late 2011. Has been there since 1 or 2 months after purchasing till now; Clicking sound when flipping the LCD screen, Down key came off easily (I rarely use the built in keyboard) and the USB problem. I think i've gotten a bad copy but haven't got the window time to bring down to apple for them to take a look at it because of my nature of work. One of my USB port is down and I suspect that it might be fried by one of my peripherals. I worried that it is a logic board issue and if I have to pay for a replacement, it will be extremely costly as compared to the smaller MBP models. Anyone experienced the same problem? I hope it will be covered by my Applecare after all, I paid over 3.5k for this thing.