I had my logic board replaced in my MBP last week. I live five hours from the Apple store, but thankfully I also have a second apartment only two hours away, where I stay on weekends. I made the two hour trek which involved a bus, a train, and a subway, and got to the Osaka Apple store where I picked up my machine. I checked it over carefully, making sure to check the isight, the airport, etc. etc. to make sure they didn't forget to plug anything into the new board. I was happy with it, and went home back to my second apartment and looked it all over again, and was again happy with it. I decided the next morning (yesterday) to REALLY comb through it one final time and I couldn't believe I missed something so obvious--the keyboard backlighting didn't work. Since I use LabTick to keep it at full brightness all the time, there was no reason for me not to notice that right away at the store, but somehow I missed it. So, I had to spend another 40 bucks and an entire day going back there just to have them plug the keyboard backlight into the logic board, which took five minutes. So, the moral of the story--always always always check absolutely everything you can think of when you pick a machine up after a repair.