No Sound 32" LCD TV, model # NS-LCD32-09: NO sound, have tried everything from having the Cable Company re-boot to viewing all settings -- can't get the sound back.

change the sound volume in channels settings /avc and try

IT MAY BE YOUR AUDIO/VIDEO CORD

Tries tv and cable box unplug,replug it back like about an hour later.For the tv to do a resetting itself back to the factory setting.The cable box to reboot and upgraded it software.Than go in to the tv Menu go to Audio Setting go down and do a resetting back to the tv factory setting.By doing these steps u have a great chances to get ur tv audio sound back.Not have the same problems after this than the tv Tuner signal board it is shorted in the audio ICS modjulation sections.Tries websites like Shopjimmy,com,Ebay.com to buy a whole refurbish tv Tuner signal board for the replacement.

Your probably having what cable guys call a SNR ( signal to noise ) issue. There's no way to know unless you call your cable provider. The SNR should be 32 and above with zero pre/post errors. In case you want to ask the tech what they are.

It sounds like the RED cable is not connected right, you did not mix the RED for audio right channel RCA plug with the RED component RCA plug? Please verify the RED, BLUE and GREEN cables again just in case, otherwise t can be the source component or the processor inside the TV.
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

right click the speaker icon on the botton right hand side, click playback devices and then in the box that appears click the hdmi sound output and then click set to defult

REPLACED MAIN BOARD
http://bestbuy.partsearch.com/PartSearch.aspx?PartNumber=756TQ8CBZK027&x=42&y=10

call the manufactur no part available

I had the same problem. Do you have a cable box for digital TV? do you have a remote from the cable company? that is programmed to control the TV? get the cable company to unlock the sound control from it (a 3 number code) put your sound up to maximum if you can if you hear faint sound repeat above you should be able to hear the tv then then go to the sound settings and adjust as needed get the cable company to check the box in cas it has been zapped by lighting good luck

If there's no sound at all, switching channels or not, then you may want to check this out:

http://bobbykolev.blogspot.com/2007/11/insignia-ns-lcd32-32-tv-power-sound.html