Basic trouble shooting 101. If you have a second system, first verify that the source [the computer] is working, then normally you would work from there, but with all those devices, the second thing I would do was as recommended, plug directly into DAC. If no joy, try a different source plugged in to same input. Use a laptop, or anything with a USB output. Have a friend bring a laptop with a player on it, or load something simple. If both the source and DAC checkout, it will be one of your devices. Too often people will get it in their head that it is the DAC or source, replace a major component only to find it still doesn’t work. Or work for hours on one input, never checking that other inputs don’t work either, that it was the amp, or preamp. Not saying that applies to you, but for others reading, there are procedures to follow when troubleshooting, that will save time, and a whole lot of aggravation. Like the guy who replaces every bulb in a string of Christmas lights, only to find it is a switched outlet, and it was turned off. Had he tried an outlet he knew was working, or plugged something that is working into that outlet, no bulb changing.
Another thing if you are running Windows 10, check your settings. A couple of times after an update I had to go in and change my settings back, as they seem to revert to the defaults. It pisses me off, I have had to use Google to do a search to locate some of them. I went from Vista to Windows 10, and a lot of the settings are not where they used to be. I am the tech* on call for my PC using buddy, who is not at all tech savvy, and I have worked on his Windows 7 & 8 with less problems finding things than 10. Maybe it is just me as I use the word “tech” loosely, but I think they move things just so people will know they actually did something. All the work behind the screen means very little to the average user, so you move a bunch of crap, for no good reason, and they believe that it’s a real update.
Blueshound, on the main Forum page you will see Profile. Click on that then “Edit Signature” you can then put your systems in, see others, or mine below. That way you won’t have to list in your posts, other than in a topic like this. Not mandatory, just a friendly tip. If you need help, ask Elk, he is the go to guy, but know he is a volunteer so he is not on call 24/7.
*Not a real tech, just compared to him, a competent user, who is not afraid to poke around. No guts, no glory.