Hello,
Have the same probleme with the power button of my LENOVO LEGION Y520-15IKBN
I open it and here how is the power button on the mother board :
[image|2355622]
There clearly a missing part that I found on the speaker after my inspection :
[image|2355623]
And here zoomed :
[image|2355629]
I put the part back at it’s place :
[image|2355624]
and put a big piece of capton on it :
[image|2355625]
Now, the power button is fully operational.