Laptop and compter HDMI cable

Forum discussion tagged with Laptop and compter HDMI cable.
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    Help! When I connect my LG TV via my Dell laptop, the some doesn't work. Can someone help

    The title all says. I'm trying to get YouTube working for my baby sister on my LG TV but it says Network error. The internet is fine tho. So I tried to hook up my laptop and my TV via HDMI cable. The picture is working but the sound from my computer only works. BTW the dell is a Inspron Idk how...