Why won't my laptop charge?

I spilled some water on my laptop while it was closed. I thought that no water made its way in and to be sure I opened up the back panel. There wasn't any water inside and to be careful I left it to dry and even went over it with a hairdryer. I put the charging cable into the port and nothing happened. I was able to turn the laptop on and the battery indicator light worked, the only thing was that the laptop wouldn't charge. Now the battery died and the laptop isn't able to run off of the charger. It's not the battery so I figured the magsafe port needed to be replaced. I replaced it and still, the laptop won't charge. The laptop should turn on even if the battery isn't working because it can run off the charger directly but that isn't happening. Apple wasn't any help because the model is now considered "vintage". Any ideas? I've also tried a few charges in different outlets.