Hi,

Suddenly the power button stopped working: when the laptop is off there is not way to turn it on with the power button. Similarly, when the laptop is on there is no way to put in to sleep with the power button. I can't force it to shut down by pressing the power button for about 10s like before either.
The only way I can put it to sleep / wake it up (without interacting with the Start Menu) is by closing / opening the lid.
To turn it on from shut down state I have to remove the AC adapter and plug it in again: the laptop will automatically turn on.
Does anyone know what could possibly causing this?

Please help.

I didn't find the right solution from the Internet.

References:-
forum.notebookreview.com/threads/power-b...-not-working.787978/
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Thanks