Find the labelled sockets
Look at the labels beside the television's HDMI sockets, using a torch or the manual if the screen is difficult to reach. Find the socket marked ARC or eARC. Do the same on the soundbar, where the television connection may be labelled HDMI OUT, TV ARC or something similar. An ordinary HDMI input on the bar can serve a different purpose, such as accepting a player.
ARC means Audio Return Channel. It lets the television send sound back along the HDMI connection to compatible audio equipment. Sony's support guidance explains this television-to-audio-system arrangement. It is useful when the sound comes from an app built into the television or from another device connected to the television. The existence of several HDMI sockets does not mean they all provide this return path.
Sketch the actual route
Make a simple note of each device and its cable destination. For example, a streaming box may feed the television, with the television returning sound to the bar. Another arrangement feeds a source into the bar first and then sends its picture to the television. Both can be valid, but compatibility and available sockets determine which suits the equipment.
Do not move every cable at once. Photograph the existing labels privately and change one connection, with the devices powered down as their instructions recommend. Leave enough cable slack to avoid pulling on sockets when the television or furniture moves. A connector that is difficult to reach is a reason to improve access, not to push it in at an awkward angle.
Use a cable that meets the requirements in the equipment manuals. A expensive-looking cable cannot add a feature missing from the television or bar. If a known-good suitable cable is available, it is a useful diagnostic comparison; buying several new cables before identifying the ports rarely clarifies the problem.
Start with straightforward sound
Select the soundbar's television input and set the television to use its external audio system. Some products also require their HDMI control feature to be enabled; manufacturers give that feature different names. Follow the instructions for the two models rather than assuming a menu item from another brand applies.
First test an ordinary programme with speech. Confirm that the sound really comes from the bar, then check volume control, mute and standby behaviour. Only after that works should you investigate particular surround formats. eARC offers capabilities beyond ARC, but supported formats also depend on the television, source, soundbar and app. Seeing an eARC label on one device is not a guarantee about the whole route.
If speech and picture seem out of step, record which source is affected. A television app and an external box may behave differently. Check the documented audio-delay settings one at a time and return an unhelpful adjustment to its previous value. This preserves a sensible baseline.
Know what a failed test tells you
Sound from a device connected directly to the bar, but not from the television, points towards the television return path or settings. No sound from any source suggests a broader power, input or bar configuration issue. These comparisons are more useful than repeatedly toggling surround options.
When the combination will not support the desired HDMI arrangement, check whether both devices offer another compatible connection, such as optical audio. That route has different capabilities and may need a separate volume-control arrangement. Choose it with those limits understood, rather than treating it as an identical replacement. Keep the final socket names in a short note so reconnecting after cleaning does not require solving the setup again.
