My MacBook won't charge, replaced magsafe board and battery.

My macbook just quit charging one day. Its does not light up green or amber. It would do this from time to time and if i bent the cable on the magsafe adapter input it would light up an begin to charge. Eventually this wouldnt work.

I bought a new AC power adapter off ebay and still nothing. It wasnt an Apple brand but was still new and was said to work. I bought a new battery thinking this to be the cause. The new battery was pre charged and after i put it in, viola it worked. However, it would still not charge. But everything else was working and running fine, i just could not get a charge to the battery.

I replaced the magsafe board after discovering these can fail and this was the next logical step....and still no charge or green led light. So what is the cuplrit?

After i put the full precharged battery i ordered in eveything seem to be fine. If its not the power adapter, battery, or magsafe board...what could cause it not too charge?

I read the next step would be to replace the logic board. But everything was literally working great when i put a full battery in...so im still not sure its something major. Is there other ways to charge a battery besides through the DC in on the magsafe board?

Please please give any thoughts on this i dont wanna have to shell out 200 bucks for a new logic board.