Hey gang, I have the 975 with 4 devices connected via HDMI, and one cable to the TV. TV is Vizio P75-C1. It did a firmware update a month or so ago, and ever since it can't acquire a "handshake" with the 975. Audio keeps unlocking, and no video to the TV. If I bypass the reciever, all is good. Latest firmware for TV is 3.4.8.5. So far Vizio support hasn't been very helpful. I've told them if they can't find a fix for me I'd like to somehow roll back my firmware. Awaiting a response. Anybody have any thoughts as to what the problem could be?
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My system:
Outlaw 976 receiver
Wyred 4 Sound Mini MC5 5-channel amp
Vizio 75" P75-C1 4k display
Currently 3.0 surround with 51" Martin Logan ESL for L/R, Martin Logan Motif-X for Center (will do full 5.1 eventually, just haven't had time yet)
Apple TV 4k
Oppo BDP-103 Blu Ray
TiVo Series 4
PS4
Motorola QIP7232 2 Cable Box