Earlier I posted problems with my MagSafe charger. http://forums.macrumors.com/forumdisplay.php?f=90 Look at this photo: ="<a href="http://picasaweb.google....AAAAAmM/Nmh563fgshA/s400/IMG_4739.JPG" /></a> View attachment 87304 Now, I've root caused the flaky LED lights sometimes showing/not to be BAD pin SPRINGS. There are four pin connectors, they are spring loaded. This way when you connect they exert pressure to force a good electrical connection. However, the springs on the two outboard ones have weakened, this caused them to sometimes connect, sometimes not. That is why when I held the male connector end "hard" into computer female end the connection would work, I was compressing the springs on the inboard pins, thereby the outboard pins would touch and juice would flow. So, I ended up buying a new MagSafe adaptor, since mine was 16 months old. I still feel this is a reliability/durability issue with the basic design, no way should those pins springs fail. Hopefully others can notice if they had same issue and get replacment from apple within their warranty. I have not taken this apart, in case apple warranty dept wants to dis-assemble it themself.