Flicker on universe 1

[Ste]

Ok so on daslight 4 running on windows laptop with dvc4 gold, running 2 universes. After a few hours universe 1 develops a strange flickering even when master dimmer is down. I have checked firmware is up to date tried each usb port same thing happens. Any ideas??

[DMXer_1]

I don't know how you connect your fixtures, but that flickering may be due to connection problems.
Check the splitter (if you use) or cables, one by one