I had this happen to my 2013 17" MacBook Pro. I knocked a cup of Coke on it and decided to fix it myself. I should note that I am not handy in the least way. After finding a guide online with a video, I followed the steps and soaked my logic board in 91% Iso alcohol that I got at a Rite Aid with a kid's soft toothbrush. I took the toothbrush, dunked it in the alcohol and lightly scrubbed the residue with the toothbrush. I let it set overnight and plugged it back in the next day (follow the guide to remember where the screws go). It fired back up after letting it sit for a minute to charge.
If you are going to do this, be warned that there are some tricky things once you open up the computer. I highly recommend that you buy an electronics repair kit, which provides several different styles of screwdriver bits that will help you accomplish this task. I got one for five bucks at a Harbor Freight Tools store.
Hope this helps someone who is in a similar position.
Found a guide for mine here:
[http://computer-hardware.wonderhowto.com/how-to/repair-macbook-pro-17-unibody-remove-logic-board-284215/|Link text]