Suddenly no signal

new board fitted last week. Was working fine with games but today midway through a PowerPoint it went black, no signal!  It’s working with a laptop but no signal with my desktop computer (that was fine previously). Ideas? 


  • Adam K PrometheanAdam K Promethean Posts: 2,249 admin
    Hi dlamont,

    Thanks for posting, do you know the model of the Promethean hardware you are using?

    I suspect that the issue with the desktop computer is that the screen settings need to be adjusted, please ensure that this is set to Duplicate or Extended and see if you still have an issue.
    Please also check your display cables and ensure that this is securely connected and the correct source is in use.

    Kind regards,
    Promethean Technical Support
Sign In or Register to comment.