Lenovo that doesnt have a fuctional power button wont turn on

[hamoudi_applemaster]

Okay so i have a lenovo b50-80 and can't power it on due to the faulty power button that doesnt work but i always power it on using the novo power button and turn it on normally but one day it just wouldnt turn on, i plugged in the AC adapter and it showed the light indicator that it was green meaning it had full battery life but when i pressed the novo button, it just wouldnt power on, not even the fan spins and i actually have no idea what to do please help...

 

[helpstar]

replace the power button board
https/de.ifixit.com/Anleitung/Lenovo+G50-80+80E5+Power+Button+Replacement/100246

 

[hamoudi_applemaster]

Im put im laptop at the tech guy and he's fixing the power button. But if that doesnt work what ould the problem be ?