We have not experienced this behavior with a black non-responsive screen. The screen has a mode in which it will black out the screen, but still be active on the network. Touching it should wake it.
Would you mind letting me know how you have it set up? Maybe we can recreate this or gain some additional insight.
There are two areas that the settings are configured for the touchscreen. In the app, under Network Devices, then click on the screens serial (or name if you have renamed). In there you can set the time of day that it “Sleeps”. Additionally, there are settings with in the touchscreen its self under “Touch Screen Settings”. Here you can enable or disable the night mode and the screen saver option.
My best assumption based on your feedback is the screen was sleeping some how and became unresponsive to touch for waking. We would be happy to RMA this screen for evaluation. You request this via techsupport@elkproducts.com and reference this post.
Thanks,
Mike