Why do I have no sound on my Xeo speaker when connected via the optical / coaxial digital input?

Check in the menu of the source device whether the optical digital (Xeo Transmitter) or coaxial digital (Hub / Connect only) output emits a PCM stereo signal with maximum 24 bit / 48 kHz (Xeo Transmitter only), 24 bit / 96 KHz (Hub only), or 24 bit / 192 kHz (Xeo 2 / Connect only). Surround signals or up-sampling signals cannot be decoded by Xeo.

Use another source with optical / coaxial digital output as a test.