Chosen Solution
I spilled water Last week on my MacBook and didn’t come on until I opened and dried the back off. Now it comes on but only when I have the changer. Also when I remove the charger it immediately shuts off. Is there anyway I could fix it?
Change the power supply. It seems to be working because the charger is giving it power directly as the PSU is not working properly. Change it, with the specific model of that laptop and once you do that, I’m sure it will work :)