Ipad goes into black screen - help

My iPad has been working well until last month. All of a sudden the screen just went black. I can see the faint backlight when I press the home button. It makes the "charging noise" when it's plugged in. I know it's working and charged, it's just that the screen show the stuff when I press On button "flash" and goes black again. I have tried resetting and restore from Itunes without success. Is there a fix for this problem or do I need to exchange the ipad? I´m unable to go to US, can I exchange it at an apple store in another country? I´m from Brazil.

Thanks