No Audio

Hello, first of all, please don't comment with buy a MAC, that doesn't help anyone.
My Dell laptop, completely optimized, USB, WLAN off, Bluetooth off, Dell programs deleted. No more updates at all.
Laptop has since run many gigs for several hours without any problems.
I also don't know whether it's the laptop, Phase or the Rane mixer. 
During the 2nd song there was suddenly a bang and no audio signal on either channel. A quick reboot and then everything ran as if nothing had happened for more than 5 hours. What could this be?
Rane 68, Phase HID, Dell 16 GB i7 13 Gen, Windows 10, Pro DJ 2.5.6