Chosen Solution
After a fall, my iPhone 8 rear camera isn’t detected and the flash doesn’t seem to work either (tested with torch function). Now I’ve opened it, disconnected the battery and disconnected the camera and re-assembled everything. It seemed to work fine then for a few hours and now the same 2 problems are back. I’m a bit reluctant to order an expensive rear camera, because I think the problems lays with the motherboard since it affects both flash and camera at the same time which are independent of eachother (right?) Is it likely that the problem lays with the motherboard?
The issue can be anywhere, camera or logic board..anything that stops working after some time is particularly difficult to diagnose for obvious reasons. Flashlight is dependent on camera, if camera stops working the led will follow suite. A camera replacement might solve the issue but that’s a pretty expensive part on an iPhone 8..hard to tell what’s the more recommendable path to choose, camera replacement or a microsoldering lab to fix the issue. In the end choice is yours.
You might of damaged the connector to the logic board during the fall
If it works for a short period of time, it could be a capacitor that is starting to fail. I recommend you have it tested at a phone repair shop and replace any defective parts.