Front camera has black screen after screen replacement

Hello!

I bought an iPhone 6s with a broken screen and a dented case. I replaced the screen and case and now my front camera is not working.

The camera app is just displaying a black screen. Everything else is working properly including the back camera and flash/flashlight. I reseated the front camera connector and did a hard reset with no avail.

Any suggestions? Should I just order a new front camera?