or you can also try this bro, yung keyboard kasi meron connector sa ribbon.. turn off muna ang laptop and remove the keyboard genlty there is a connection sa keyboard flex at conector nya sa board basta gently lang ang pag tang-tang para di maputol or madamage ang flex then using a toothbrush and a cleaning fluid like a lacquer thinner, apply a bit sa toothbrush then scrub the keyboard flex connector sa motherboard gently.. pag nalinis muna insert the keyboard flex sa connector turn on your laptop the type og balik.. baka sakaling gumana bro..