i dropped my samsung galaxy express but when i turn in on the light are on but the screen is completly black.how can i fix it?

Solution
After you re-install the battery, turn it back on. If it works, great. If not, something may have been knocked loose inside. You may need to take it for repair.


how can i Re-install the battery?
 


then when i re-install the battery what can i do next?
 


can you plz tell me the best solution about my phone...thank you