A software crash, outdated iOS, or a faulty app could be the reason why your iPhone camera is not working or appears to be black!. BOSTON, Here’s a roundup of the best iPhone deals for Black Friday, including all the top offers on networked and unlocked Apple iPhones Shop the full selection of deals. Restart your iPhone If restarting the camera app did not fix the black screen issue, restart your iPhone Hold the side lock button down until the.