Keyboard doesn’t work after unplugging, and replugging it

Troubleshooting Keyboard Connectivity Issues After Reconnection: A Case Study with the Redragon Finka K715 PRO

Introduction

Many computer users rely on reliable keyboard functionality for productivity and seamless user experience. However, hardware connectivity issues can disrupt workflows, leading to frustration. This article explores a specific issue encountered with the Redragon Finka K715 PRO keyboard on a Windows 11 system, providing insights into common troubleshooting steps and potential solutions.

Scenario Overview

The user reports that upon initial connection of the Redragon Finka K715 PRO keyboard via USB, the device functions correctly. However, after unplugging and then replugging the keyboard, the device is recognized by Windows 11’s Device Manager as well as in configuration tools like VIA and QMK. Despite proper detection, keystrokes are not registered—pressing keys yields no input.

An important observation is that switching the keyboard to Bluetooth mode introduces similar behavior: initial connection works, but switching modes or connections causes the keyboard to become unresponsive, even though the device remains recognized by the system. Interestingly, on an Android device, the keyboard functions correctly regardless of connection method changes, suggesting the issue is isolated to the Windows environment.

Troubleshooting Efforts

The user has undertaken several troubleshooting steps, including:

  • Resetting the keyboard settings
  • Removing and re-pairing Bluetooth connections
  • Performing Windows updates
  • Updating device drivers

Despite these efforts, the problem persists, and the keyboard remains unresponsive after reconnection, aside from certain function keys.

Additional Findings

Further experimentation revealed that function key commands, such as FN + F1 and FN + F2 for volume control, work even when other keys do not function. This indicates that the keyboard’s firmware is partially operational, and only specific inputs are affected.

Potential Causes and Recommendations

Based on the described behavior, several possible causes and solutions can be considered:

  1. Driver or Firmware Compatibility:
    Ensure that the latest drivers for your motherboard’s chipset and USB controllers are installed. Check for any firmware updates from Redragon for the Finka K715 PRO, which may address connectivity issues.

  2. Power Management Settings:
    Disable USB selective suspend settings in Windows to prevent the system from disabling the USB port during idle periods. This can be adjusted via Power Options in the Control Panel.

  3. USB Port Compatibility:
    Try connecting the keyboard to different USB ports, preferably directly to the motherboard rather than through hubs, to rule out port-specific issues.

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