Quick Answer Summary
"If your phone won't turn on, first force restart it by holding Power + Volume Down for 10 seconds. If a battery icon appears, plug into a known working 20W charger for 15 minutes. If unresponsive, the issue is a dead battery cell, faulty charging port, or shorted PMIC."
### Diagnostic Decision Tree
Branch A: Device Has Black Screen but Vibrates 1. Force restart device. 2. If screen remains black, internal OLED panel is damaged -> **Requires Screen Replacement**.
Branch B: Device Gets Extremely Hot While Charging 1. Disconnect charger immediately. 2. Inspect charging port for debris or burn marks. 3. If port is clean, battery cell has short-circuited -> **Requires Battery Replacement**.
Branch C: Phone Drops into Bootloop (Stuck on Logo) 1. Ensure storage is not 100% full. 2. Perform soft reset. 3. If logo persists, NAND flash memory or OS system corruption -> **Requires Data Recovery & Flashing**.
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