#VivoS1ProDeadSolution #MobileRepair #VivoRepair #DeadPhoneFix #VoltageTesting #PhoneRepair #MotherboardRepair Is your Vivo S1 Pro completely dead, not charging, and showing no signs of life? This professional, step-by-step tutorial provides the 100% working solution by diagnosing the motherboard's Input and Output (IO) voltages. In this detailed guide, we go beyond simple fixes and teach you the expert method for identifying the root cause of a no-power issue on the Vivo S1 Pro (Model: 1920, PD1945F). Learn to use a multimeter to check critical voltage lines like Vbat, VPH Power, and various VREG outputs from the Power IC (PMIC). This method is used by professional technicians to achieve a high success rate in mobile hardware repair. What You Will Learn in This Video: Initial Diagnosis: How to confirm the phone is truly dead and not a battery or screen issue. Required Tools: A list of tools needed for the repair (multimeter, soldering iron, etc.). Motherboard Voltage Points: Exact locations on the Vivo S1 Pro board to test key voltages. Input Voltage Testing: Checking Vbat (Battery Connector) and USB VBUS lines. Output Voltage Testing: How to check for VPH Power and secondary voltages from the PMIC. Identifying Short Circuits: Simple techniques to find and diagnose a short circuit on the motherboard. The Final Solution: A practical demonstration of the repair process once the fault is found. This tutorial is perfect for mobile repair technicians, engineering students, and advanced DIY enthusiasts looking to solve complex motherboard-level problems.
Frequently Asked Questions (FAQ) for Vivo S1 Pro Dead Solution: Q: How do you fix a Vivo S1 Pro that won't turn on? A: The most reliable method is to perform a motherboard diagnosis by checking the input and output voltages. This video shows you how to check Vbat, VPH, and VREG lines to find the exact component failure or short circuit causing the no-power issue. Q: What are the main power IC voltages for the Vivo S1 Pro? A: Key voltages include the battery input (Vbat ~3.7V-4.2V), the primary system voltage (VPH Power), and various regulated output voltages (VREG) from the Power Management IC (PMIC) which typically range from 0.8V to 2.8V. Q: My Vivo S1 Pro is not charging and not turning on. What is the solution? A: This "no charge, no power" state often points to a primary line short or a faulty PMIC. Our guide helps you test the charging circuit input (VBUS 5V) and follow the power sequence to pinpoint the problem. Q: How to find a short circuit on a Vivo S1 Pro motherboard? A: Using a multimeter in continuity/diode mode is the first step. For more advanced diagnostics, techniques like rosin smoke or thermal camera analysis can be used to visually locate the component that is heating up due to the short.