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By PURPLELEC | 03 January 2025 | 0 Comments

USB Port Troubleshooting and Repair Guide

  When you use a USB wired mouse or keyboard and suddenly find that the cursor is unresponsive or the keyboard fails, this may be a problem with the USB port. To determine the problem and fix it, you can follow the troubleshooting steps below.
  I. Determine the source of the problem
  Multi-port test: If your computer has multiple USB ports, try connecting the accessory to other ports, or connect it to another computer's USB port for testing. If the accessory works fine on other ports or computers, the problem may be with the first port.
  Other accessory test: You can also use other USB accessories (such as USB flash drives, mobile phones, printers, etc.) to test this USB port. If other devices work fine on this port, then your port may be normal and the problem may be with the device that failed to connect.
USB hub
  II. Check the USB port hardware
  Appearance inspection: First check the appearance of the USB port for damage or dirt. If you find that the port is severely deformed or damaged, it is best to seek professional help or buy a new computer. If there is no obvious damage to the port, check whether it is blocked by dirt or dust, and use a thin plastic or wooden tool (such as a toothpick) to gently remove the obstruction.
  Internal connection check: Connect the USB cable or flash drive and shake it gently. If the connection is unstable or disconnects briefly, there may be a physical problem. If you feel a lot of movement when shaking, it may indicate that the port is bent or detached from the circuit board. It is best to leave it to a professional.
  III, software repair methods
  1、Restart the computer: When the computer freezes or the device is not correctly recognized, restarting the computer may be the most direct way. Sometimes the simplest solution can solve the problem.
  2、Device Manager Check: View USB devices in Windows Device Manager. If you can't find the USB host controller, you may need to click the "Scan for Hardware Changes" button on the toolbar to detect all connected hardware. If the problem persists, you can try uninstalling and reinstalling the USB host controller.
  3、Reset SMC (for Mac): If you are using a Mac, resetting the System Management Controller (SMC) may solve the problem. Check Apple's tutorial on resetting the SMC and do it according to the type of computer.
  4、Check power management settings: In Windows, check whether the power management settings override the USB controller. If low power mode is set, it may cause USB devices to not work properly. You can adjust these settings through the power options in the control panel.
  5、Update the system: Although the possibility is small, it is possible to fix the USB port problem by updating the system.
  IV, use a USB hub
  In order to avoid the pressure on the computer's USB port caused by frequent plugging and unplugging, you can consider using a USB hub. In this way, you only need to use one USB port of the computer to expand more USB ports, which is more convenient to connect. Especially for devices such as laptops and iMacs, using a USB hub can greatly improve the convenience of use.
USB hub
  Through the above steps, you can effectively troubleshoot and repair USB port failures to ensure that your device can work properly.

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