Include:
| Symptom | Module-Swap Fix | Board-Level Fix | | :--- | :--- | :--- | | No Wi-Fi, greyed out | Replace Wi-Fi module (requires soldering anyway) | Reball Wi-Fi IC or repair its SPI bus line | | No charging | Replace charging port flex | Replace Tristar/Hydra IC (iOS) or charge controller | | No cellular service | Replace antenna flex | Reball baseband PMIC or repair RF output | | Phone stuck at 1% battery | Replace battery | Replace fuel gauge IC (TI BQ series) | advanced hardware lab 9-2 troubleshoot mobile devices
Below is a comprehensive guide to mastering the objectives of Lab 9-2. 1. The Troubleshooting Methodology Include: | Symptom | Module-Swap Fix | Board-Level
To successfully complete this lab, you should be familiar with: For non-destructive entry. Never puncture a Li-ion battery
Never puncture a Li-ion battery. If a battery is swollen, do not apply heat to the screen above it.