MacBook shuts down immediately both when power button is pressed and when lid is closed

Question

Hey there,
The mentioned issues have happened to me for a couple of years or so. Specifically, when I press the power button it shuts down right away along with a click. Same happens when it sleeps; the light starts glowing and before a full seconds passes, I hear the same click and it shuts down. It started around the same time my battery died out of nowhere so I always attributed it to that. Now I got a new battery and it's still there. I tried resetting the SMC with both methods. The built-in keyboard had coffee spilled on it years ago so it doesn't really work, but I tried the key combination anyway. It didn't fix the problem, so I tried unplugging the battery and holding the power button. That didn't work either. What could be causing this issue?
Thank you.

Answer 1

Your problem is way more complex, here's my standard answer:
"Whenever a liquid spill occurs the first thing that has to happen is the laptop should be shut down immediately. All power must be removed as soon as possible. It is especially important that the battery be disconnected and removed.
All affected parts must be removed from the laptop. No attempt should be made to start/restart the computer since this could potentially damage the logic board beyond all repair.
Then all affected parts would be washed in deionized water and blown dry with compressed air. (In a water spill the deionized water is probably not as critical. Depends on the mineral content of the water.) and blown dry with compressed air.This is especially true of the large chips on the logic board. Water can wick under them and cause havoc.
The logic board should be placed in a drying/dehumidifing oven for at least two days. Longer depending on the spill.
  The keyboard is a separate matter."
Also red wine would be one of the worst things you could spill on your computer.