Problem: USB not recognized
Solution:
◆ Check the USB pins for any deformation
◆ Check the USB pins for any foreign matter or signs of oxidation
◆ Disassemble, and connect the USB +5 V and GND pins to ensure that the voltage is normal
◆ If using a knock-off product, replace with an authentic licensed USB device
◆ Individually power large-current USB device, especially mobile hard disks
