Your deviceHisense A7Q QLED
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What to do now
Check the cable
Make sure the device is connected with an HDMI cable, ideally to a port marked ARC or eARC for a soundbar.
Device-matched visualHisense A7Q QLED · Hisense VIDAA

Hisense A7Q QLEDHisense VIDAA · 14:32
Back of the TV
HDMI 1
HDMI 2 (ARC)