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Category Blog

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…

Glory 50 does not charge

荣耀50不充电
Disassemble the machine first for testing, and the measuring switch tube 5V is also normal, considering that mobile phone I have fallen, so let's try to short-circuit the switch tube first. If the fault remains after short-circuiting the switch tube, then give priority to whether there is virtual welding of the charging inductor. The specific maintenance process is as follows:

Asus A550V notebook does not trigger repair

iPad7 A2197不开机 2

Asus A550V notebook does not trigger repair. Machine model: ASUS A550V Main board version number: X550CC 2.0 Fault phenomenon: the notebook does not trigger, and there is no standby current. Asus A550V notebook does not trigger maintenance Figure 1 Take…

Apple iPad7 A2197 does not turn on

iPad7 A2197不开机 2
IPad7 A2197 customer said that it would not be turned on when it was used, and directly removed the ammeter on the motherboard to see the current, and found that the standby current was normal. After triggering, the current was only 22mA. After looking at the CPU model, it was found that it was the commonly used A10 CPU. This CPU caused quite a lot of iPad with small current, which was a common problem, so the CPU was directly redone.