I have an older Vizio M3D460SR TV, and the audio output jack has started to malfunction. The jack output is connected to my stereo. The other day, I had to disconnect the audio cable from the jack, to reach behind the TV. The problem started after I reconnected the cable. Now, the audio began randomly switching from my stereo, to the TV speakers, and back again.
My initial suspicion was a bad solder connection. So, I opened-up the TV, pulled the main board, cleaned all of the old solder off of the jack terminals, and resoldered them. But, the intermittent problem has persisted. My only conclusion is that the jack is bad.
Unfortunately, I have been unable to find a part number, so that I can order a replacement. I have trolled the internet with every possible combination of search terms that I could conceive. I could not even find a schematic for my TV. It seems ridiculous to have to scrap a $600 TV, over a $2 part. We all know how terrible the internal speakers are, on these flat screens.
Or, could the problem be some sort of "smart" switching, not related to the jack? Some jacks operate that way. Again, there is no way of telling, without a schematic. Any other suggestions?
My initial suspicion was a bad solder connection. So, I opened-up the TV, pulled the main board, cleaned all of the old solder off of the jack terminals, and resoldered them. But, the intermittent problem has persisted. My only conclusion is that the jack is bad.
Unfortunately, I have been unable to find a part number, so that I can order a replacement. I have trolled the internet with every possible combination of search terms that I could conceive. I could not even find a schematic for my TV. It seems ridiculous to have to scrap a $600 TV, over a $2 part. We all know how terrible the internal speakers are, on these flat screens.
Or, could the problem be some sort of "smart" switching, not related to the jack? Some jacks operate that way. Again, there is no way of telling, without a schematic. Any other suggestions?
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