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It is not a common fault that Lenovo Y7000 notebook can not be powered by CPU when it is not turned on
After checking the drawings and measuring, it was found that the south bridge was damaged, and the return signal from the south bridge to the CPU was not processed, which led to the failure of the CPU power supply. The south bridge was replaced, and the power supply came out. Installation, startup test, perfect lighting, troubleshooting, and maintenance are over