LED did not lit up and the battery is not charging
I'm using Macbook model A1342 late 2009
For the past 4 months or so, it's been hard for the charger connect to properly connect and charge. However, it has always worked when I wiggle the connect a bit. Last week, no matter how hard I try, it won't charge. I tried to use my friend's charger but still, it wont charging. I can still turn on and off my laptop while the battery is about 40% left. I even install the Macbook application install DVD for apple hardware test and it said that my laptop is working properly. Untill the battery turns 0% and it shuts down on its own. I first thought it was the battery failure. Then, I sent it to a local apple service centre in Russia to make sure whether I can change a new battery. They run some diagnostic and said it wasnt the battery, it was the logic board! I never spill any liquid on it. And how is it possible that the logic board is broken but I can turn it on???? Can someboy please help me??
MacBook, Mac OS X (10.6)