What do I do if my iPad doesn’t work

If your PC or Mac does not recognise your iPad when connected, this support page may be helpful with troubleshooting the problem:

If your computer doesn't recognize your iPhone, iPad, or iPod - Apple Support

What exactly are you seeing on the screen to your iPad? Did you receive an error, or is it that the iPad just won't turn on? See this if it just won't turn on. If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support