Presario c700 (c765tu) no sounds. drivers installed but no sounds

For starters here is a link to your manual: http://h10032.www1.hp.com/ctg/Manual/c01301275.pdf. Does your laptop know that the hardware is there? you can find out by going into your device manager and look under audio. If your computer knows its there then see if there is a question mark beside it. if it is there delete it and reboot. your computer should see it and load the correct drivers. If it is not there then check your computer documentation to see if you need to enable it in the bios or some other place. Hope this helps!