Galaxy S3 Screen Black problem

[goodly]

Please Help
I buy new samsung Galaxy S3 Model GT-19300 less than month ago, without reasons yesterday the upper left side become black with blue color then few hours the color is grow up to full screen .. now my phone working but can't see anything !! anyone can Help please? :'(
Thank You

 

[Paul627g]

This really sounds like a hardware/screen display failure.

 

[Roll_Cam_Tide]

I would have to agree, maybe try taking a screenshot of the problem and see if it appears in the image (Probably won't).

EDIT: If you cant see anything at all you may not be able to navigate to the image. Not sure about this, but if you have an sd card installed it would hopefully save it there. If so, try to get the screenshot off the sd card and view it on another screen/device.