I have a faulty sound card on laptop. No sound despite driver, mute button and other tests. Will a usb sound card enable the laptop speakers to work If so which is b,the best usb sound card to get
No it will not... Your laptops speakers are tied directly into the on board audio....
So if you use usb sound card you need external speaker or headphone...
For quality usb soundcard try Asus Xonar Essence One , if you want a smaller design try StarTech