Chosen Solution
I am not getting a green light on my MacSafe adapter and my computer will not power up. It thinks it is plugged in because when I hit the power button it displays the empty battery symbol with a lightening bolt, but no plug I replaced my power supply and batteries a couple of years ago so I am suspicious the problem is somewhere else. Is there a way to determine whether the problem is in the MagSafe board or the logic board?
It could be a internal issue. Most probably liquid or moisture damage on the logic board. as it is quite old model, this is very common in macbooks. its better to get it diagnosed by a technician. i have repaired hundred of macbooks with this problem.
