My Samsung Galaxy S3 neo isnt turning on?

A

AC Question

This morning, I put my perfectly fine, working, Samsung Galaxy S3 Neo aside to go and get washed. It had around 60% charge. When I took it upstairs, I accidently stubbed my toe and the phone landed on a hard object and then went on to the carpet. It didn't go with much force, and there was no new scratches or cracks on the screen. I tried to turn it on, but it didn't work. Confused, I took the battery out, and when I put it back in there was a very small flash from the phone's back camera light. I did this again and there was another flash, and another. I put it on charge and the light is just staying on.
I've tried holding down home and power, (battery in), holding down power (battery in) and doing the same with the battery out and trying to turn it back on again. Very confused, please help.