– after backing up data (lab may not allow backup to simulate emergency).
No power, USB meter shows 0.01A. Diagnosis: Open device. Look for corrosion near the USB-C port and power management IC. Clean with 99% isopropyl alcohol and a soft brush. Use ultrasonic cleaner (if available). After cleaning, check diode mode on the power button line. If shorted, replace the power button flex. Success rate: ~60% if cleaned within 48 hours. advanced hardware lab 9-2 troubleshoot mobile devices
Is it a swollen battery, a digitizer failure, or a rogue app? – after backing up data (lab may not
Advanced troubleshooting involves identifying if the "ghost image" is permanent hardware damage or temporary image retention. C. Connectivity and Signal Problems a digitizer failure
Order parts or prepare for data backup.