For iPhone and iPads alike, if the thin black flex that connects the flood illuminator to the logic board is accidentally torn during a screen replacement, then the flood illuminator won’t be able to turn on the porch light of the Face ID system. Even just a single drop of water from a Clorox wipe, or a drop of sweat from your morning run can work its way through the ear speaker mesh on the front of the phone, and cause corrosion under the flood illuminator Water damage to the flood illuminator.The most common cause of Face ID not working is: The MOST common problems with Face ID not working are problems with the Flood illuminator on the top side, i.e. If we imagine an opened iPhone as a clam, the Face ID components are split between the top and bottom ha l v es of the clam. However, with microsoldering, we CAN repair many of the common problems that cause Face ID not to work in today’s phones. This may change as right to repair legislation makes its way across the world. Unfortunately, none of these components can simply be swapped out from a working phone because each of them is cryptographically tied to the CPU of your phone. These are the key components of iPhone facial recognition:ġ.) The Flood Illuminator: this tiny laser is the “porch light” of the Face ID system.Ģ.) The Dot Projector: this component uses a prism to project an array of infrared dots onto your faceģ.) The “ TrueDepth Cameras” include these two cameras with stereovision for depth perceptionĪ.) The normal front facing, aka selfie, camera Let’s start with an understanding of how Face ID and the TrueDepth camera system works inside your iPhone. The good news is that most of the common Face ID problems are repairable.

You’re probably here because Face ID is not working on your iPhone, and you’re wondering how to fix it.

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