Screen issue with Xperia J

[Winter_Marine]

Recently I dropped my Xperia J on a rocky surface. It had happened several times and the only thing that had happened was that the battery came off, so I didn't worry. Now, however, the screen won't turn on. The phone itself is working perfectly internally, the home, options and back buttons light up and it vibrates when I actually turn it on, but the screen remains black, although it slightly lights up.

I'd be very grateful if someone had an answer to this.

[Uliwooly]

It will be really hard for anyone to give you an answer, it could be that the LCD's ribbons are loose, it could be that you need to replace the LCD, it could be that there's something wrong with the motherboard, etc. 

You should stop by your local Sony

http://www.sonymobile.com/global-en/support/contact-us/