Jamie
As stated already, make sure you check all power cords to your HT equipment, the pre-pro and the amps. also check all your output connections from pre-pro to amplifier.
Another thing you might try before anything would be to go into the pre-pro menu where the test signal is created and see if you can send a successful test signal to all required speakers.
Otherwise a microprocessor reboot might do the trick. You may unfortunately lose all your preferences, settings, etc.
Edward
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Analog Sources: Oppo 203, Oppo 105, DirecTV, AppleTV 4K, Roku Ultra, Nvidia Shield
Digital Sources: Aurender W20 via USB and dual XLR, dCS Rossini and Clock
HT Processor: Anthem AVM90
PreAmp: Audio Research Ref 6
Amp: ML 536 (2), Rotel 1552 (3), Rotel 1585
Speakers: Focal Maestro EVO, Focal 1000 Utopia Center, Focal 1000 IW6 side/rear surrounds, Focal 1000 IW6 X4 Ceiling, Rel G2 X 2 subs, Martin Logan 1500 X 2 subs, B&W 805D2 in master bedroom
Video: JVC NZ8 Projector
Power: Shunyata Everest, Sigma XC (1), Sigma NR (1), Sigma Analog (2), Alpha HC (2), Alpha Digital (2), Alpha Analog (1), Viper(1), Venom Digital(1)
Cables: Shunyata Anaconda SC, Anaconda IC (2), Shunyata Sigma USB, Shunyata Sigma XLR X 2, Shunyata Sigma Ethernet, Shunyata Clock Alpha X 2, Sigma x 1
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