"hitachi 42PD8700U FLAT TV HISSING SOUND THROUGH SPEAKERS HIGH PITCHED SQUEEL CRACKLE BUT I PLUG A SPEAKER INTO HEADPHONE JACK IT IS PERFECT
Check and replace its audio output IC.
SOURCE: can't connect wireless stereo to sylvania 6620LF4
Hi, Ok, I now understand what the problem is. Sorry I missed the fact that it is due to no audio outputs on the TV. The audio board is designed to power low impedance speakers and doesn't have a big power amp to drive them. I do not have a schematic of that particular TV so I do not know how the headphone jack is wired. The way it basically works is, when you insert the plug, the tip pushes a contact away from another contact thus making one circuit and breaking another. You can test this externally by inserting an unwired plug or look at it from the inside and bridge the tip connection. I would only advise this if you have some technical skills. Other than that the thing is working like it was designed, they don't want you to use both. Sorry, I hate to give this type of news, but I am one of the only ones who will. Good Luck to you!
SOURCE: No output from right side speaker jack
audio board located inside the mainboard console to the right trace your speakers wire to bd, disconnect the three leads, 3 phillips screws, and examine bd for burns. If yes, ebay the board id for a replacement.
SOURCE: Buzzing sound coming from TV Speakers and any external speakers
change your pre-amp ic sure it will work. or maybe cold solder from the board.
SOURCE: No sound from external speakers system
Look into your monitor settings and computer settings and see if you can reverse the "input" and "output". If both are set to line in or line out then they pretty much cancell themselves out.
SOURCE: headphone jack fault on 32" samsung TV
I don't know about replacing a jack but BN94-01208C fits LNT1953HX is the main pcb that has all of the av inputs on it and it is a snap to change.
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