This of course changes the channel to "9" in the channel list. Just for clarification ... the mute key on the Vizio remote is just above the volume key on both Vizio Remotes and nowhere near the "9" key. This evidently has nothing to do with the BT400 remote pairing.
With the BT400 factory reset, not paired and CEC disabled, the Vizio remote still sends a "9" to the player ... shows up as a 9 in a black box in the upper left hand corner. I suspect your code for the "9" button is the same as Vizio's "Mute" button.
Next I tried to get the remote to re-pair to the TV. The screen indicated it was pairing to the TV and a "1" was shown on the screen. I pressed the "mute" button and "9" showed on the screen with the corresponding change of channels.
Next I did the factory rest of the BT400 again but this time I tried the manual setup .... there is no code list for any Vizio TV in the TV list. (see attached)
My original theory was that the pairing would send the Vizio remote codes to the X5 to use kind of like the OSMC's Raspberry Pi version of Kodi does with the CEC turned on. However, it evidently does not appear that is the case and none of the BT400 keys - ON/OFF; Volume; any number key including the "9"; etc - work after an "Auto Setup".
Don't know what you can do about this but without a fix everyone who has a Vizio TV will probably not be pleased.
