If your Honour Board image is flashing black randomly - Most likely someone had moved the mouse on the screen.
If the rolling honour board detects any mouse movement it thinks that you might be planning on exiting back to the interface (control panel).
When this happens the honour board will randomly flash.
To stop this - press [F2] to return to the interface.

Then select [Start honour board order]
The honour board will start running again (without flashing).