Back camera doesnt work even after replacement

I bought this phone for what i thought would be an easy fix n flip.

The power button and back camera werent working.

I replaced both parts. However, while doing so, much to my horror I noticed the phone was water damaged. Replacing the parts fixed the power button, but the back camera still doesnt work.

The u3200 chip and that area had a slight bit of green corrosion, so i cleaned it gently with alcohol.

Nothing appears damaged, burnt, or exposed, and the board looks squeaky clean now, but even after that and restoring firmware and trying a few tricks online the back camera still comes up black and the flash wont work.

When i switch to video recording, the flash icon turns red and says the phone is too hot and must cool off for flash to work.

Any tips on how i can try and troubleshoot this problem? I have basic tools like a microscope but microsoldering is out of the question... No warranty either.

Absolutely any advice on either what component is likely the problem or what i can do or check to narrow it down would be greatly appreciated!