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If your Sharp LC-45D4CU television is not producing sound when you connect an external speaker or sound bar to the audio out jack, there are a few potential causes and steps you can try to fix the issue:
Check the audio out jack: Make sure the audio out jack is clean and not damaged, and that the connection to the external speaker or sound bar is secure.
Check the audio settings: Make sure the TV's audio settings are set to output sound through the audio out jack. You can check the settings in the TV's menu or user manual.
Check the external speaker or sound bar: Make sure the external speaker or sound bar is turned on and set to the correct input. Also, check the speaker or sound bar's connections and make sure they are secure.
Check the cables: Make sure the cables connecting the TV to the external speaker or sound bar are not damaged and are securely connected.
If these steps do not fix the issue, there may be a problem with the TV's audio out jack or the external speaker or sound bar. In this case, it is recommended to contact Sharp customer support or a TV repair technician for further assistance.
Regenerate response
There should not be any problem in connecting this TV to Sound Bar. Check all the connections. Contact any service technician to seek help in this matter. Refer the user manuals to both the sets.
With a RCA (F/F) to 3.5 mm (M) adapter, you may be able to connect the headphone audio out to your sound bar directly. This is an example: http://www.cyberguys.com/product-details/?productid=4730 . I'm not sure if this will automatically disable the TV speakers.
The other option is to get a digital audio to analog audio converter. One of these is http://www.amazon.com/Digital-Audio-Analog-Converter/dp/B0013LWK3A . You'll also need the optical digital cable in addition to the RCA audio cable that you have. With this you'll have to follow the manual for turning on the digital audio output on the TV (under the Sound menu) and turn off the TV speakers.
You have obviously connected the sound bar's RCA (red, and white) cables to the TV's IN jacks rather than the OUT jacks, OR you might have them connected to the RCA VIDEO jacks. Check it. Connect them to the TV's audio OUT jacks. Presumably, the inputs on the back of the TV are marked "audio out", and the IN connections from your sound bar must go into the OUT inputs on your TV. I can't imagine what else it could be causing the problem.
Dish doesn't appear to have a code for Samsung receivers but try the Sharp codes listed. Here's a link
http://tech.dishnetwork.com/departmental_content/techportal/content/tech/remotes/TechRemo5.3Code.shtml#amp
Same thing for the LG remote
http://lgknowledgebase.com/kb/index.php?View=entry&EntryID=3252
I recommend connecting your sound bar to your dish receiver as well as to the television. Play around with optical and RCA to see which one you prefer the sound of. The television isn't always the best center channel so you might find that you like this set up better with the dish receiver connected directly to the sound bar. Then you can shut of the television speakers. Some people turn the television speakers back on and leave the sound bar off for early morning breakfast news viewing. Not being sure which dish receiver you're using you might have to indicate to it how you wish to output your audio, or all outputs might be outputting at the same time all of the time.
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