I need a user manual for my Dell Inspiron 5110 laptop. Also, the built-in microphone and speakers stopped working and control panel cannot even find them. I managed to do a microphone setup, buy is said the computer cannot hear me clearly. What to do? I use QQ to communicate with my family in China, but they cannot hear me and I cannot hear them. I used to use facebook to communicate with them and we could hear each other.