When you plug the tablet into the computer, do you get any notification on the tablet that its connected by usb? When I connect my samsung tablet, I get a notification saying its connected as a media device. If you press it, you can change it to media device or camera. If the computer doesn't make a usb sound detecting the tablet then something is wrong with usb port or tablet. Try a different port like one of the rear ones. Were you using the case usb ports?