lenovo3 15itl6 motherboard service centre

problem:

keypad is not working completely and will not turn off computer,and restart after set desktop and beeb sound is preventing to access the desktop.we observe the motherboard each section to find the problem.there is no sign.we struggle to find ultimately.novo button is in trouble and that part is inactive.

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solution:

clean to blow through the instrument for getting hot then active.now can do power off,restart,typing keypad.