How can I fix my lined screen on my Samsung Galaxy Tab 10.1?

I was reading my Kindle app when suddenly the screen on my Galaxy 10.1" tablet went blank. The battery was low, so I figured it had just died. I pressed the power button to double check and my screen showed up, except that 3/4 of the screen was black and the rest had streaked lines where the background would be. I can't even do my unlock code because I cannot see it. There has been no water damage to it and it has never been dropped. I have also never altered the coding. I tried charging the battery, powering down and restarting but the screen stays the same. Please, help. Could it be the video card? I have only had it since December. Update: I attempted a hard reset, but I can't see enough of the screen to continue the prompts. Any suggestions would be helpful. --- Update: I attempted a hard reset, but I can't see enough of the screen to continue the prompts. Any suggestions would be helpful.