Do I need external speakers for this TV? I am getting no sound after I hooked it up to my cable box. I had sound when before I moved to this new house. If there should be sound without extra speakers, how do I troubleshoot it?
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HDMI carries both video and audio.
Do you get video and audio on TV. Just to be sure.
Now are the external speakers powered ?
are you connecting the Speakers to Audio Out of the TV ?
By the way, I cannot see any RCA port that is output port on your NEC plasma. NEC 50XM4 User Manual Specifications The audio input is for audio from dvd for example.
If the sound bar has the red and white cable then yes you can use those. Make sure in your settings for the TV you have it set for an external audio source. Since you don't want to use the built in speakers. Probably best to get a tuner if using multiple speakers and a sub.
OK ~ try this... Connect a makeshift antenna to your Antenna proper connection/connector.
Almost anything somewhat large, flat and is metal should work OK... Even a length of old lamp cord may work too! Hopefully you are in range of at least ONE standard HDTV DIGITAL broadcast transmitter(s) "over the air".
IF your audio is now OK suspect that CABLE BOX!
And how about your DVD player? Is your audio and video good using it?
Sounds like the TV volume is set too high, with little or no audio input.
If the sound is coming from the speakers and you are using an external input such as a cable box you may need to turn up the volume output from the box, and turn the TV volume down.