iPhone X Face Id Fail Light Sensor Repair

A customer came to our shop with her iPhone x that is stuck at the apple logo. Normally, the highest possibility part to be faulty is the screen. Then we found out that the light sensor was malfuncitoning and needed to be replaced. She agreed to it and our technician replaced the light sensor within 20 minutes. Later she told us that her face id was not working since 2 weeks ago. Lucky for her the face id was working again after replacing the light sensor. She was happy to use her iPhone back again happily.