Visio 4K TV - DirecTV

Recently purchased a 70" Vision HD4K TV. Since connecting it to the Directv HD DVR receiver am experiencing annoying problems as follows:
When turning on the TV using the Directv remote I usually get the picture but not sound. To get sound I typically have to change the channel several times &/or turn the TV on and off, perhaps several times. Then when changing the channel I have the same problem again at times. The cable (a HD premium 4K HD one) is connected to the Directv receiver's HDMI outlet while the other end is plugged into the TV's HDMI outlet.
Need to get this resolved ASAP so I don't have to change subscribers to get this done.

This question, "Visio 4K TV," is about DirecTV channels, programming, equipment, and sports.
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