The power button becomes non-functional on my AL1912 Here is a quick fix to try if you have similar issues. May work on other similar Acer products as well (not sure though).
I attribute these episodes to power dropouts or spikes or sunspots (not sure in other words). I fix it about once a year like this Press and Hold these three buttons on the lower control panel: > (right arrow) + Menu + Power When the power comes on you are done. These are the three buttons I've colored red in the photo.
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