Chosen Solution
After replacing the battery and speakers in my Mid 2012 Retina MacBook Pro according to this guide, I reassembled the computer and noticed that everything worked perfectly except for the iSight camera. Symptoms: No green LED when attempting to use the camera"No video capture devices were found.” in System Information > Hardware > CameraNo camera visible in System > Hardware > USB“No camera available” in FaceTime, Photo Booth, and SkypeApple hardware diagnostics shows no camera detected Solutions attempted: Reset PRAM/NVRAMReset PMCTested with a brand new admin userAttempted to boot into Safe Mode, but the boot loader seemed to freeze at the very endBooted into network image at the Apple store and no camera was detectedKill VDCAssistant and Apple CameraAssistant (They were not found; I don’t believe these processes exist on Mojave)Unseat and reseat the camera cable (twice)Inspect the camera cable (no visible damage) Before replacing the battery and speakers, I occasionally had an issue where the camera would not be detected but a quick reboot always solved the problem. When disconnecting the camera cable during the battery replacement, this cable was the most difficult to remove. I had to apply a good bit of force, but the port is still solid on the logic board and there’s no visible damage to the cable. I always pried (alternating) on the protruding sides of the connector until it wiggled out. The only 2 theories I have left is that the cable may be very sensitive or I may have blown a ferrite bead although I’m 90% sure I never disconnected or reconnected the cable while the battery was connected. How sensitive is this cable? How can I determine if a ferrite bead was blown? Does anyone have any other ideas?
Ferrite beads can be tested for continuity with any multimeter, if blown you lose continuity. However, by experience, in some cases, continuity is not sufficient to guarantee a correct performance unfortunately.
Disconnect the camera as show in step #6 of this guide: MacBook Pro 15" Retina Display Mid 2012 Logic Board Replacement Blow it out with canned air and carefully reseat it.
I have this same exact problem. No solutions found.
