How awful day!

I got really shocked!!
All of the sudden, the display of my mobile phone does not indicate and show anything...
It only spreads the darkness on the display and it may be broken at last.

I have been used this mobile phone for more than two years, so it is the time to change old one to new model.
However, I do not change it and purchase new one because the latest model is very expensive for me.
In addition, I do not have enough time to buy new one.
So, now, I seriously consider what should I do.
Should I change or repairer.....