Front facing Camera on iPhone 6 inoperable after screen replaced
I recently had my iPhone6 cracked screen replaced, and my frame recentered after I inadvertently sat on my phone. However, immediately after I received my phone back from this place, I found my front facing camera (the main camera used for taking pics) was completely inoperable - the screen is just black. Moreover, the back facing camera (used for selfies) was very delayed in display. I took it back to the repair place, who were adamant that this type of issue with the front camera cannot be due to the repair to the screen and frame, insisting that they don't get anywhere near the front facing camera. Both cameras had been working without after the screen was cracked, and prior to having it repaired. The camera was not working immediately after taking it to get repaired.The repair place attached another camera, and had the same issue. Therefore, the issue is not with the camera itself, but rather the connections. The repair place suggested i do a DFU reboot, which i have done to no avail. The camera remains inoperable.
I would appreciate some feedback as to: (1) whether it is possible that this damage to the front facing camera can be done while replacing the screen and reshaping a bent frame; and (2) what specifically likely happened during this repair to make the camera inoperable. I have no doubt that the damage was sustained due to this repair work. I just need to show this person what likely happened.
Appreciate the feedback. Thank you.