Water damage help
So I have a Macbook Pro 13in early 2016 model, and I spilled sprite on my keyboard. I immediately turned it upside down to dry out, and see if that would help. It didn't work or show any indications of surviving the spill, I went to the Apple Store and was told the best option was for them to send it in. Which would cost $800, I didn't completely rule that option out but it wasn't a priority. I have tried recently to plug the charger in, to see any indication that it worked. To my luck, the orange charging light turned on. So I then tried to boot it, it booted up smoothly and there seemed to be no real issues it was charging, all the keys worked, etc...The only real issue is that it shut off out of nowhere, and won't turn back on or show any indications that it is charging anymore. What could be the cause of this?
MacBook Pro with Retina display, macOS Sierra (10.12.3)