My macbook air doesn't recognize the built in camera.
My macbook air 13 inch is updated to the lastest macOS high sierra ver. 10.13.3 and until now the camera is unrecognizable. I have tried the sudo killall command thing on the terminal and it didn't work. I tried asking help online from Apple support but still no use. My last option is to go to the nearest iStore but before I do that I wanted to make sure I have used all my online resources for answers that could fix this. What else can I do that doesn't involve 3rd party softwares or any unnecessary downloads that could harm my macbook air?
MacBook Air, macOS High Sierra (10.13.3), 13 inch early 2014