Réponse à : « Ambient Light Sensor not working after LCD replacement »If you are having this problem, it is because your screen was replaced with a display assembly replacement that did not come with a light sensor (True Tone) technology. There are many screens sold on the market with and without true tone sensor. True tone screens are more expensive. You just have to ask the repair shop if they are using true tone screens or not. They can buy and use both screen types to repair your MacBook screen. we use both screen types in our own repairs and sell them as well on maclaptech.com, It really depends on how much the client wants to spend.