HDMI 8" LCD Screen(1024x768) - no signal message

Hi, I recently bought the 8" HDMI screen for a small project and it’s a great display - but as Pimoroni developed the driver board is it possible (either through firmware, software instruction from the Pi, or even by accessing an ‘engineers menu’ on the display itself) to disable the on-screen messages - mainly the No Signal message? I am not powering the screen via the Pi so when I shut down the Pi the screen displays the No Signal message which doesn’t look right for my project.