I have a UD-3900 Docking station. It is connected to my laptop and I have one monitor, the ethernet cable and a wired mouse connected to the docking station. It has worked very nicely for me the first couple of months I have owned it.
Recently, I am experiencing random disconnections of the UD-3900. The reason I am describing the problem as a disconnection is the second monitor will go blank ( the open applications move back to the laptop monitor) and there is an audio cue that sounds the same as when you disconnect a USB device. The disconnection only lasts 3-5 seconds but it is really becoming annoying. It can happen while typing or when the machine is idle (no inputs).
I don’t think any settings have changed but there is always software updates occurring. I am running Windows10 Home on a Dell G3 17 laptop. Thank you for your help.