How to solve the sound issue not coming from the SONY DAV-DZ660 home theater system when connected to a TCL TV via HDMI?

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When the sound is not coming from your SONY DAV-DZ660 home theater system connected to a TCL TV via HDMI, several settings need to be checked. Start by ensuring that the HDMI cable is properly connected to the HDMI output of your DAV-DZ660 and to an HDMI input on your TCL TV. Use a good quality HDMI cable, preferably certified, as a faulty or low-quality cable can prevent sound transmission even if the picture displays correctly.

Next, check the audio settings of your TCL TV. Access the settings menu or audio settings of your television and look for the audio output option. Set it to send sound to the HDMI port to which the SONY system is connected. If your TV has an HDMI ARC (Audio Return Channel) feature, make sure it is enabled. Since TCL TVs are not equipped with BRAVIA Sync (Sony's proprietary technology), manual configuration is necessary. Also, disable the TV's internal speakers in the settings if you want all sound to come from the home theater system.

On the SONY DAV-DZ660 itself, press the source selection button and choose the HDMI source. Refer to the manual or remote control to locate this button, usually labeled INPUT or SOURCE. Ensure that the HDMI source is selected and that the system volume is not set to minimum. If you were previously using another source (CD, tuner, VIDEO/AUX input), that previous source may still be in memory, so it is important to explicitly switch to HDMI.

Perform a practical test: completely restart both devices. Turn off the TCL TV and the SONY DAV-DZ660, wait 10 seconds, then turn them back on in this order: first the TV, then the home theater system. This sequence allows both devices to negotiate the HDMI connection and audio settings correctly. If sound appears when playing a DVD or another source, it indicates that the HDMI connection is working and the initial problem was related to the settings.

If the sound still does not come out after these steps, try another good quality HDMI cable to rule out a cable issue. Also, check that you have not already connected the DAV-DZ660 to other devices via the VIDEO/AUX inputs (red and white RCA jacks) that could create a source confusion. Refer to the DAV-DZ660 manual to check if there are any firmware updates available, as an update may improve HDMI compatibility with TVs from different brands like TCL.

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