connecting Bose 1-2-3; what settings do i use on Roku tv to get picture & sound

DBDukes trac3y 

The Bose system includes a built-in DVD player, so if she wants to watch her DVDs on the TV (or from another source connected to/through her Bose), she needs to connect a Composite (yellow) cable (one is included with the Bose) from the Video Out connectors of the Bose to the Composite (yellow) Video In connector via the 3.5mm AV adapter (included with the TV).

Otherwise, if she wants to listen to the TV through the Bose, she needs to connect an Optical (SPDIF) cable (not included, she'll probably need to buy one) from the Optical Output port on the TV to the Optical Input port on the Bose.

When watching a DVD, she'll need to switch the TV's input to "AV" or "Video" or "Composite" (whatever TV input corresponds to the AV ports); likewise, when watching TV (or anything connected to/through the TV such as via an HDMI port), she'll need to switch the Bose's input to "Video 1" if she wants to hear audio from the Bose.

(NOTE: Its not clear why Bose support mentioned using a 7-pin S-Video cable/connection, since the Bose uses a 4-pin S-Video Output, but its moot regardless since the TCL TV lacks an S-Video input)