help. With Water Damage

Best thing you can do is take it in to the closest genius bar (or other authorized repair facility) and get it cleaned out. While it may seem the unit is operating OK - other than charging - liquid spills can cause corrosion inside which can eventually cause complete failure of the main logic board. It could even be residual moisture, and/or corrosion, causing the charging problem.

 

The MagSafe board on the newer Pro's isn't really a large secondary component like it used to be, now all it is is just really a cable that conducts power to the Logic Board. My best guess is it's probably the logic board, and like the post above, I'd recommend going to an Apple Store or an Authorized Retailer and get it checked up/cleaned out.
I'd also try cleaning the MagSafe port where the charger plugs into if you haven't already. My computer can be really finicky if the port is dirty.

Also, you don't need to capitalize the first letter of every word. Your post would look just fine without that, I promise.

 

I was thinking the same thing

The first two posts really hit the nail on the head - I would take it back in and have them look at it given your self diagnosis of technical abilities. It would be horrible to mess around with it yourself and make matters worse.

Good luck!