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Dell’s DELL VOSTRO 14-5468 notebook is not turned on for repair
The charging indicator is not on. Focus on detecting isolation circuit and charging circuit. Measured along the circuit towards the power interface, it is found that one side of MOS transistor PQ741 has a voltage of 19V and the other side has only 5V. After replacing PQ741, the voltage at the common point is normal, and the voltages of 3V and 5V also come out. The machine was successfully repaired.