iPhone panic 0x83, 0x1c4: Proximity sensor

Panic codes: 0x83, 0x1c4

How to fix it

The panic points to the proximity sensor (screen auto-dimming in calls), on the front top flex.

1. Test with a known-good part.

2. Diode-mode the FPC connectors to find any fault.

By Hasan Patel, iPhone Fixer. Check your own panic