Mark,
Have you worked your way through the trouble shooting guide? If you haven’t, that would be the best place to start.
I’m sorry, but right now I am very busy and don’t have time to accept any kits to troubleshoot. But if your Quaverato was working for a while then it’s probably not too far away from working again. The noise could be caused by a lot of things. Once it’s working again we can try to troubleshoot where it’s coming from. But for now, start with the troubleshooting guide and see if you can make any headway with that.
Good luck.
-Brach