@ItsMe2
OK, my working hypothesis would be that your BT TV remote wasn’t controlling the soundbar as such, but it was controlling the TV, where by HDMI-CEC, as JVC call it, Control Other Devices as Google call it, this was in turn controlling the soundbar.
To get back to this, you need to have the BT TV remote controlling the TCL TV - have you done that yet? - and CEC turned on, on the TCL.
The remote is supposed to automatically pair with the TV that the Pro box is connected to by HDMI, but I don’t know how dynamic this is when it’s already been paired with the JVC. But if so, you can re-pair it thus:-
The BT TV Box Pro remote should connect to most TVs automatically. If yours does not pair, you can reset your remote by holding down the Home and 9 buttons until the light on your remote flashes. If resetting your remote does not work, you will need to use your TV remote and BT TV remote separately.
Hopefully, the TCL will pair OK. I’m assuming you have a Pro box there; if not, you will definitely need to change the TV the YouView remote is set for, manually, according to the manual that came with your box.
I would expect CEC to be on by default with the TCL TV, but perhaps not. Here’s how you do it, if you need to:-
https://support.tcl.com/us-googletv-setup-configuration/activating-control-other-devices-cec-for-goo...
I’m also assuming the soundbar is connected to the TV via an HDMI cable going into the HDMI port on the TV that is labelled ARC or eARC?
Any remaining issues, though, please post again, specifying the model of YouView box, and the make and model of the soundbar.
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*** Longtime YouView box owner, BT Broadband customer, finally an EE TV subscriber ***
