screen problem, it seems off

hello there

this is reza, from I.R.Iran and I bought an iPhone 6s RoseGold for my wife 2 weeks ago from Iraq. It was working very well but since yesterday the screen went some how off, it's so deem, so close to off.

I'd searched the apple site to resolve my problem. Is there any chances to fix my wife's iPhone?

It's registered to my apple ID. I'll be in touch for your answer.

I hope you can help me out in this situation...

with best regards