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  • Joined: 2021-11-01
  • Articles: 531

Huawei P30 has no fast charge

华为P30无快充
Excluding external factors, after receiving the machine, we directly disassembled it to test the motherboard. When checking the tail socket, we found one.diode; the one who lacks dialectical thinkingIt has disappeared, and after repeated measurement and comparison, it is determined that this line should be in a state of breaking, which is definitely abnormal.

HP TPN-C133notebookNon-startup maintenance

惠普TPN-C133笔记本不开机维修 图5

HP TPN-C133notebookNon-startup maintenance “Machine model” HP TPN-C133 【 Fault phenomenon 】 There is standby current, which does not trigger. [Maintenance process] After receiving a machine that is not triggered by HP Light and Shadow Wizard TPN-C133, first remove the motherboard…

A2141 fan can be turned on or off without display (resistance corrosion near GPU power chip)

A2141风扇能转不开机不显示
applenotebookA2141, the fault is that the fan can be turned on or off and not displayed. When the motherboard was removed and powered on, it was found that the current was set at more than 200 mA, and the fan was always turning. The voltage of each inductor of the motherboard was measured, and it was found that the GPU power supply did not come out. How to repair it next, and then read the following!