1423 – Speaker interference on ActivBoard 300 Pro

1423 – Speaker interference on ActivBoard 300 Pro

Applicable to:

  • ActivBoard 300 Pro

    ActivBoard 300 Pro

You may notice some interference, humming or crackling from the speakers on the ActivBoard 300 Pro if the cables on the back of the ActivBoard are not plugged in firmly.

To resolve the issue, ensure that the white USB cables located on the back of the ActivBoard in the top left hand corner are fitted and connected securely:
User-added image

If you are still having problems, please ensure that any other cables are connected securely to the ActivBoard and also into your computer.

Finally, if the problem remains, please try connecting another computer to your ActivBoard before contacting Promethean Technical Customer Support.