I have acer aspire 4720z laptop sound working good but enternal mic and built in

[ArehmanQ]

Hello,
i have acer aspire 4720z laptop sound working good but microphonl mic and built in mic not working . any one help me to sort or my porblem

 

[The Stealthinator]

Make sure your laptop has an inbuilt mic, then check you have the necessary drivers for the sound card in your machine. You can get them off the Acer website.