I know that this is now an old thread, but I wanted to let others that have the LE857U class of televisions about an issue that I have experienced:
The sound died on my LC-80LE857U recently. Thankfully, I did purchase the Square Trade extended warranty when I purchased the TV. Square Trade arranged for a replacement System Board, and sent a local tech out to replace it. That fixed the sound, but the television's 3D capability went away - there are not even any menu setup selections for 3D, and some other menu selections went away.
It seemed as if the wrong board was installed - even though the board that was installed was compatible with the TV on a basic level. Not happy with the tech as he should have checked that.
I called up Square Trade again, and they sent out another board. As it turns out, it's the same board as the one that was just replaced.
This time I researched the web and, yes, the board that was installed IS the correct board for that TV, but the board has to be configured and told which TV that it's installed in.
At the moment, I don't know whether that is done via the Service Menu or flashed to an EPROM, but a tech will be here on Tuesday to fix it.
If anyone has a problem with the LE857U class of televisions that requires replacement of the Main/System board, the correct part number is "DKEYMF953FM06." This board also applies to:
LC-70LE757U LC-80LE757U LC-90LE657U LC-60C6500U LC-80LE857U LC-60C7500U LC-60LE857U LC-80LE657U LC-80LE650U LC-80C6500U LC-70LE755U LC-70LE657U LC-70LE650U LC-70C7500U LC-70C6500U LC-60LE755U LC-60LE657U LC-60LE650U LC-70LE857U
After the replacement but before the tech leaves your house, check that all of the setup menu selections that are specific to your television are present.
For the record, I still LOVE this television!
Last edited by Fritz1234; 08-13-2016 at 08:49 AM.