MacBookpro shuts down few seconds after reboot

Yes you should do SMC reset and see the result otherwise if problem is unresolved then contact Apple Authorized Service Provide for a further hardware test. I am saying so because the impact may have taken by logic board. By the way, you have dried up your system perfectly and let me tell you this computers behaves abnormally after water/coffer spills. However, upon drying them, they may get back to normal state (may). I also read a post by a user who dried his Mac and turn it on after 2-3 days, it worked fine.