I HAVE A 50" EMERSON T.V. AND I HOOKED UP A SOUND BAR TO IT AQND I DON'T HAVE NO SOUND

The onn cannot be connected to the Emerson wirelessly.
If it is connected to the Emerson TV, there has to be a wire plugged in to the audio output on the TV and the left and right input connectors on the sound bar. I have heard that you will only get about as much sound from the sound bar as the TV.
You cannot use the digital audio outputs.

What is it connected to on the TV?

Repair the defective sound board.

How to Connect Soundbar to TV audio
If you wish to get some details; check the site linked here. Pull up older posts. http://electro-medical.blogspot.com/

iLive iTB174B Bluetooth HD Sound Bar for 22 - 55" Flat ...

www.amazon.com/iLive...Bluetooth-Sound-Bar/.../B0...

Amazon.com, Inc.
Rating: 3.7 - ‎6 reviews
iLive HD Bluetooth Wireless Soundbar Speaker TV Stand For 20-55" Flat Panel HDTV's Up ... when you purchase $5.00 or more of Qualifying Items offered by D.R. Worth and Sons. ... The iLive Bluetooth HD Sound Bar for 22 - 50 Inch Flat Panel TVs is cleverly designed to ... Click here to make a request to customer service.

iLive iTB174B Bluetooth HD Sound Bar for 22 - 55" Flat ...

www.amazon.com/iLive...Bluetooth-Sound-Bar/.../B0...

Amazon.com, Inc.iLive iTB174B Bluetooth HD Sound Bar for 22 - 55" Flat Panel Televisions ...Bought another for a relative. ... **2 things to NOTE: 1-make sure there is nothing aside from your tv on top of the speaker to avoid rattling, which i mistook for distortion/blown speaker at .... It sounds much better than the Samsung internal speakers.

How to Connect Soundbar to TV ' Audiogurus Store

www.audiogurus.com > Learn: Home > Displays

Check the speaker/s first. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

Try another component video cable. It sounds like the red signal isn't getting to the TV.

Try this link to download the user manual. http://tv.manualsonline.com/manuals/mfg/emerson/20digital_analog_television_cr202em8.html. Check this link too. http://electronicshelponline.blogspot.com/ Pull up older posts there, either by its left side bar, or see it in Timslide option.

Does the tv have rca jacks for audio or a optical jack.?

make sure the power is hooked to the back of the monitor, and that the speakers are hooked into it. make sure it is switched on and volume is at 50% or higher. if it still doesnt work, try hooking an mp3 player to the speaker jack. if they work, its the computer. if it doesnt work, replace the speakers.