Has picture but no sound.
This tv is giving me a profound headache..story was: picture no sound. Ordered replacement board (the board to which the speakers connected to)(repeat several times) all had other faults but no sound restored! Decided to fix original board..found 2 blown caps. Still no sound. Up until today I was convinced that the problem must be on the board because other boards gave different problems. Have searched all over board and can find no other faults so bought this final board..still no sound! I initially checked the 2 speakers for continuity and moved on. I know nothing about tv's or speakers apart from what I'm learning as I go. I think the speakers must be the problem but no idea really how to test them/repair them.. the volume bar on the display moves up etc, have been through all the settings/menu-no help at all. Any ideas??
Quick check of speakers: disconnect from board output and momentarily connect a 1.5 volt battery. You should hear a "pop" when connecting and disconnecting, if the speaker is good. Speakers unlikely, however. Two at once indicate blowing the speaker coil due to power overload, which also is unlikely from a TV audio amp.
Each speaker is connected to an independent stereo output from a dual channel amp, yet each side has the same problem. Blown caps indicate a power problem. Multiple board replacement without problem resolution indicate a problem external to the board.
If it's the power supply, it's an output providing voltage just to the audio circuits. You probably need to troubleshoot -- replacing all components multiple times can get expensive.