When a Vivo Y93 shows 0.00A current draw on a USB power analyzer or is completely unresponsive, follow this trace:
Measure the output voltages (Buck and LDO lines) to ensure the PMIC is alive. 2. Fake Charging / Not Charging
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A verified repair package does not just contain a circuit blueprint. A complete, high-utility download package includes three specific components: Schematic Diagram (PDF)
: Often caused by the SM5414W charger IC or a disconnected 20th pin on the sub-board BTB connector. Display Light : Specific light "ways" diagrams When a Vivo Y93 shows 0
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Check the secondary voltages ( VREG / LDO lines) powering the CPU and eMMC/UFS storage chip. If these voltages are missing, the PMIC may need to be reballed or replaced. 🔌 Charging Faults (Fake Charging / Not Charging)
Locate the main Power Management IC (PMIC). Check the surrounding decoupling capacitors for short circuits to ground. Must read 3.7V to 4.2V.
