How can you tell if a 3.2 tft screen is faulty or not?

I have a SainSmart 3.2 tft screen that does nothing but light up. I have asked on here and other places but every I have tried does not work. So I am wondering if its broke. Note: Its brand new.

It could be an incompatible library.

I don't think so.

Are you the poster that fixed his display to see it's back? If so the backlight ribbon cable is clearly broken. unless you are Very good with a soldering iron, I don't mean just solder I mean skilled with applying heat precisely and the right amount. You'ld do well to buy another one.