Sound and picture problem

sounds like an internal connection problem. open access panel and check the solder connection is not broken or loose. Be sure the metal mesh jacket is not touching the lead wire as that would cause a scratchy noise and feedback, or maybe near the internal cable causing feedback

Sounds like a min board fault. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/

The fault is with its mother board [main board]. SCL-SDA line short. If you wish to get more details, check the site linked here. http://electronicshelponline.blogspot.com/
Pull up previous posts by its left sidebar, or type in the brand name and model number to of your set, to its search box, and press 'Enter' or view it in Mosaic / Timeslide option.

Small component board that controls sound could be faulty. It is near the bottom of the tv and the size of about a quarter. Another possible cause is "shorting" due to assembly ...If the speaker wire comes in contact with the metal at any point you will get this type of noise. Either way, you will need to take your tv apart to truely tell if the board is bad, or the wire has been cut slightly.


Thank you and best of luck!~

A scratchy sound may indicate that your speaker is clipping, or worse, blown. Make sure you are not running too much power to the speaker, or you run the risk of destroying your subwoofer. Reduce the power and see if the scratchy noise has gone away. If not, you may have damaged your voice coils by putting too much power through the speaker.

Hi there , the green light just means its getting Power, it doesnt mean that its going to give sound, It could be that you dont have Drivers installed for your Sound card which is causing it too not get sound , but when it makes that static noise , its the Wire just causing Static with the Sub , just means its getting power , The + and - sign is the volume control ...Try see if you can turn it louder with the + . maybe it is low enough not too hear.....Hope this helped Bud
Happy new year.

Congrats, you yourself is a good troubleshooter. Just pinpointed your problem. What you just diagnoist can be easilly checked just by taking other good known speaker. If that works your speaker is short check for audio output wires. If not your card needs replacement. If need further clarifications just comment.

the main total assy is failing. it has the tuner ,sound, and a lot of the processing for the set check there first

Try the speakers on another PC with good working sound. This will indicate either a speaker problem or a sound card issue.

If speakers work ok on 2nd pc, then you have a sound card issue on your pc. If speakers are still scratchy on 2nd pc.. check the metal connector end, make sure it is clean and shiny. If there is any rust or other oxidation, clean it off with a very fine grade of sand paper

Are the speakers old? The only thing that can make a random scratchy noise on the speakers as far as I know is a dirty volume knob. Try turning it all the way up and all the way down (with nothing playing) and see if that helps. If it does, blow them out with some compressed air. I'm thinking your issue is probably software / driver related though, does the scratchiness happen in other programs? WinAmp? Windows Media Player? .. if it does, you've narrowed it down to a driver-related issue, go to your sound hardware's manufacturer website and download the latest drivers.