What do you recommend I try?

I see this thread is a couple years old, but I thought I'd try asking anyway..

About 2 years ago I spilled water on my Macbook pro A1278. After letting it dry out and rebooting, etc...the backlight had a "wavy" effect at the bottom of the display and on occasion would start turning on and off. I opened it up and cleaned any spots I could find on the logic board. After that the display seemed better, but still looked a little wavy at the bottom. I thought I'd wait and see what happened before trying anything else. That worked fine for a year or so, then the backlight would just suddenly not work for a few days, but worked fine with an external monitor..and then suddenly it would come back and be fine for a while. It's continued sporadically this way for about a year now. Over the last couple months it's gotten worse, but I noticed that many times it would come back on after plugging the charger in. This didn't work all the time, but a majority of the time. Now think it's finally given up though... it is mostly off and will occasionally flicker on. So, I've been using my tv as an external display. DO you think the fuse is the issue in this case? My thought is that a fuse would stop completely all at once instead of gradually get worse, but I don't know. What do you recommend I try? I am not familiar with soldering, etc, but I can take the computer apart with directions :-)