I’ve had the same issue afrer I throw a glass of wine on my keyboard 🙂 It’s probably some keys are jammed, not exactly power button, try to push all buttons by flat hand, do it sevral times and press power button. And if it not help, keep do it again and again 🙂
After succesfull bot i’ve invetigate witch keys are going to jamm, by linux command “evtest”. I’ve unmount them, and clean up under the rubber button using toothpick.
the kb is fixed to a metal plate via a lot of plastic stems what are melted flat.
you have to cut them all off after you removed everything to get to the metal plate
after you changed the kb how will you fix the metal plate again?
a bluetooth kb is the much more easy fix
they even have some nice flat ones now with a trackpad