battery charges & new logic board but still won't power on

My macbook got a little wet awhile back and completely stopped working. However, the charging light on the charger would still come on and turn to green if left charging for long enough. I assumed the battery was fine and bought a new logic board. I installed the new logic board but it still won't power on. The battery stills appears to be charging. I realize that there's the possibility that the logic board I ordered could be bad also. Is there any other reason that I am overlooking that would stop the macbook from powering on?? I'm lost at this point.