Lenovo Miix 510 laptop external keyboard cannot be repaired

Machine model: Lenovo Miix 510 notebook

Fault: notebook external keyboard can not use, no response, new keyboard can not be used.

Maintenance process:

The keyboard interface was tested with the meter, and no abnormality was found.Take the screen apart and test the data of the interface pin. It is found that there is one data pin and Short circuit. If you look up the data on the drawing (the same drawing as Lenovo Miix 520), the USB bus is directly connected to the CPU. If the i7 6500u CPU is purchased from a second-hand 800 yuan, the customer certainly does not want to change it. Other USB ports and devices on the machine are normal,I wonder if Jump wire can change another group of USB data to realize keyboard function.

Lenovo Miix 510 notebook external keyboard can not be used for maintenance Figure 1

Lenovo Miix 510 notebook external keyboard can not be used for maintenance Figure 2

The WWAN position on the motherboard is empty, even the slot is not installed. Check the drawing 7 and 9 pin, corresponding to the two USB data pin, cut off the wiring of the keyboard interface data end,Jump wire to WWAN 7, 9 pin.

Lenovo Miix 510 laptop external keyboard cannot be repaired

Lenovo Miix 510 notebook external keyboard can not be used for maintenance Figure 3

Lenovo Miix 510 notebook external keyboard can not be used for maintenance Fig. 4

Lenovo Miix 510 notebook external keyboard can not be used for maintenance Figure 5

Installation test, external keyboard can be used, fault repair!Two Jump wire to solve the problem.USB port is directly into the CPU, the controller is integrated into the CPU, I hope that the damaged port has no impact on the CPU.