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Hello, I need bit more info about sound problem in TV.
- What video devices/ sources (such as cable box DVD player etc) are connected to TV and does the problem occur on all video input sources?
OK, what are you referring as 'regular jacks' in question?
Is TV connected to any sound system?
OK, please increase volume level by pushing volume up button on TV remote, does the volume bar display on screen and do you hear faint hiss from TV speakers?
OK, it seems sound amplifier chip failure in TV that provide sound signal to speakers. Sound amp chip is located on main board of TV and either sound chip ins't getting working volts from power supply board or chip itself has got internal issue, it needs further troubleshooting to determine the bad board, if volts are available at sound output chip then main board of TV will need to be replaced to resolve the problem. Please check with following board supplier and ask for required board if they have it in stock..
If you are not comfortable working on it yourself then you may please use following link to get list of TV repair shops in area which will help to get repair quote...
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Please check 13V DC at PH connector of power supply board with multimeter, if 13V is available then replace the board where sound amp chip is mounted, please check following link to view terminal board where sound processor chip is mounted which will help to locate it in TV..
There is square chip located on top right of board image which is sound processor chip and if 13V isn't available at power supply connector then swap the power supply board in TV, please check following link to view power board image..