No sound/metering with 828es ("audio engine inactive")

I initially had some similar trouble with my 828es.
You might consider the following if not already tried.

  1. Check Device Manager - Audio inputs and outputs.
  2. In my case I had trouble with the USB controller. Try different USB3 ports and also make sure no other device is running on the same port.

My Firmware version is 1.3.5+181
Driver Version Windows 4.0.8.2000

For what its worth MOTU Support were very good and eventually we resolved the problem.

Good luck