Description of the problem: A connected external device is not recognised and therefore cannot be used.


Possible causes:


  • The driver for the device is not installed.
  • The device is deactivated via the BIOS.
  • The device is not switched on.
  • The device is not connected correctly.



Possible solutions:


  • Install the driver for the device. You may receive further information in the operating instructions for the device or from the device manufacturer's support.
  • Enter the BIOS to activate the device.
  • Make sure that the device is switched on.
  • Ensure that the device is connected correctly.