Is the display shot or can this be fixed? Thanks
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Re: LG 42LE5350-UB Troubles
Take pictures of the back of your set so we can see how the main board and T-con board are connected to each other and to the screen.
There is a chance this could be panel or it could be T-con/main board.
Try disconnecting half the panel, and see if the still connected half fixes itself. If not repeat the process with the other half. (Disconnect half the panel by disconnecting one of the ribbons between the T-con and panel) -
Re: LG 42LE5350-UB Troubles
Thanks for the reply! Before I can get pictures, I need to take it back apart.
I did disconnect both sides of the T-con one at a time and the panel just turned white.Comment
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Re: LG 42LE5350-UB Troubles
That means you may have a bad T-con or bad main.Comment
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Re: LG 42LE5350-UB Troubles
Back of TV pictures. Thank you for your help!Attached FilesComment
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Re: LG 42LE5350-UB Troubles
That looks like an extremely regular pattern that is repeating itself across the screen so I don't think it's the panel.Willing to help but I'm no expert.Comment
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Re: LG 42LE5350-UB Troubles
That's good news!
Can't seem to find the main board/T-con online. Any ideas where to look on the board itself for problems, I don't see anything obvious?Comment
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Good day, I have a TCL TV: Model 43s423. After turning ON the TV, the ROKU TV logo appears with fine lines over the whole screen, then after a while there are vertical bands in the middle of the screen top to bottom and the TV tries to update its firmware but I do not have the remote to connect it to my new network connection. Also the Power ON light blinks 2 times in quick succession. When I remove the ribbon on the right of the tcon board the left side of the screen shows but with fine lines. If I remove the left side ribbon and connect the right side ribbon the whole screen is blank with... -
This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.
I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match... -
LCD displays a 2nd image slighty offset vertically. And multiple pairs of black lines along the bottom. Probably common as google "TCL 49S405 double image" pulls up this ifixit post ( link ) with identical ( nearly, but their fault seems to be on the other half of the panel than mine ) problem without solution.
This one looks to be a more difficult to diagnose because most? of TCON seems integrated ( CSOT BGA on buffer baord) into the left panel edge board ( looking from rear of TV) There are 2 buffer boards for each 1/2 of the screen. Main connects to the left buffer board... -
My goal here is to be able to use boards on hand to swap into faulty sets when the faulty board is not obvious.
I will start by asking what is the format of the output from the mainboard and is it generic in any way or does it vary by manufacturer and/or model ?
And as far as I know a tcon and panel must be a matching pair because the timing of the signals and the voltages required to drive the panel are specific to the panel itself. (That may be a blanket statement that isn't true in some cases where the panel creates its own sub-voltages on its panel boards?)...01-06-2024, 01:32 PM -
Hi,
I have a VIZIO E70-E3.
Symptoms: Black screen, no picture, but LED backlights are working.
I probed the power board and voltages are as listed on the board.
Main board appears fine, too.
I believe the problem is either a bad T-CON board, or connection to LCD, or bad LCD.
There are two separate ribbon cables feeding the LCD.
If both are connected, the screen is black.
If only the ribbon cable that feeds the right side of the screen (when viewed from the front) is disconnected, the left side of the screen shows picture and...
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