Water damage but still works when I hold a key down?!

Laptop had a beer spilt on it about a week ago. Dried it out for a week and It powered up with the white apple logo showing but then shuts off randomly. I opened it up and could see water stains on the battery so I replaced it hopeing that that would be the problem. Now I can get it to power up in recovery mode and run disk utility BUT I have to keep the command and R keys help down other wise it shuts down.

Is the keyboard faulty and causing it to shut down randomly??