Answer to: Battery will not charge. MagSafe adapter remains green?Hello Serdar, actually my solution was simple: there is one more circuit board inside macbook which is responsive for displaying battery charge with green led lights when you press the button. When it is damaged it may confuse the mainboard that charging is not working or no battery at all. The magsafe unit and the mainboard still may work properly, even if liquid damaged. In my case I simply disconnected this led lights circuit from the mainboard and the macbook started charging the battery. Later I carefully washed this circuit AND the mainboard + magsafe module with DISTILLED water, let it dry two days and things worked again, including the led lights.
Answer to: Can you replace a 2.0 Logic Board with a 2.4?Sure you can. My late 2008 2.0 GHz unibody Macbook was liquid damaged so I bought and replaced the MB466LL mainboard for the 2.4GHz MB467LL one found relatively cheap on eBay: http://www.ebay.co.uk/itm/140673273612 All works fine, although it still does not see the battery - DC in charging module or battery controller seems to be damaged as well, have to replace it.