I need sound divers for averatec 3700,because my notebook has no sound

SOURCE: Averatec 3700 notebook is charged but will not

Try to remove the battery and turn the computer on with only the AC adapter connected. If it works then the battery is failing. If it does not there is something wrong with the motherboard or the AC adapter. hopefully it is just the AC adapter. Try to borrow an AC adapter from a friend or anybody else. Make sure that the current and power rating is exactly the same. Or else you might end up with a burned laptop. It the known working AC adapter works, then it is your charger. Buy a new one.