iPad mini screen won't work on lock/home screen or turn off, but will in apps?

[Sophie]

I bought an iPad mini just over a week ago and the screen started playing up the yesterday, the only way I can use apps is to tell siri to load them, but then when I'm in the apps, the touchscreen works fine. It won't allow me to slide to unlock, flip between/click on things on the home screen or slide to power off. We misplaced the receipt and have looked everywhere for it. Would a hard reset help or would it just make it worse? If there is nothing that I could do, how much would it cost for a shop to fix?
so won't it matter about losing the receipt?

 

[mcdonaldcj]

Take it to your local Genius Bar at an apple store... They'll fix it for you under warranty because it sounds like a hardware issue...