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Colorful 3060 12G is not energized (the resistance of 5V power supply opening circuit is invalid)

七彩虹3060 12G不通电 图2
Colorful 3060 12G is not powered on, and the motherboard is directly removed after the street graphics card. First, the major power supply inductors of the graphics card are measured without obvious short circuit. During the measurement, it is found that Q505B has been turned on to pull down the B pole of Q505A, and Q505A has been turned off, but no 2.5V power supply is detected at the upper end of R600 resistor .. The specific maintenance process is as follows:

Huawei notebook WFH9 does not charge

华为笔记本WFH9不充电

Huawei notebook WFH9 does not charge. Fault model: Huawei notebook WFH9 Fault symptom: No charging. Maintenance process: I received a machine sent for repair by my peers, the model of which is Huawei notebook WFH9, and the fault is that…