LNS4692D - TCON Board (seems there is a systemic issue)

Hi,

please run a channel scan on your tv before checking for the issue again. If the issue persists, please remove all accessories from the tv before restarting it. If necessary, you can then power cycle the tv. Otherwise, you can move onto running a factory reset on your Sony tv.

Thank you.

I have no idea why you would change the power board 3 times, this is the one board that can be tested with a simple multi meter, voltages are marked on the board, ifor future reference you know the 5 volt standby is working, next thing to test is the PS_ON pin coming from the main board, there should be about 3 volts there when the set is turned on, if no voltage replace the main board, if normal power-on voltage test the other rails, if all good the power board is working. Also a tcon board will never give the issues you have, a bad tcon will give distorted picture or blue screen without a picture. Now for what's wrong, according to service lit the blink code you have is bad inverter-backlight issue, since this set is LED it doesn't have an inverter so it's a LED backlight issue. Replacing the backlight strips should correct your issue, unfortunately on a set this size and with it being edge lit replacing the strips isn't a real easy job, this set has a diffusion panel behind the panel (screen) and it has to be replaced correctly or the picture won't look right, also with this size panel extreme care must be taken when handling the panel, suction cups work the best for removing and replacing it. Good luck!

The TCON board or the LCD panel is faulty. Can confirm by replacing the TCON board .
If you wish to get some details; visit the site linked here. Pull up older posts. http://electro-medical.blogspot.com/The TCON board or the LCD panel is faulty. Can confirm by replacing the TCON board .
If you wish to get some details; visit the site linked here. Pull up older posts. http://electro-medical.blogspot.com/

I had same problem. Vertical banding means its not TCON - (timing controller) - these issues would be more likely horizontal in nature.
Probably the Main board needs replacing

short answer is yes but by replacing the tcon board itself by removing the ribbon cables from the tcon board itself (hopefully.....)

Either the t con board is no good or the issue lies within your main board.

Kind of sounds like a panel issue but they generally aren't intermittent, you could try replacing the TCon board

for bn94-00963b go and change your backlight inverter

No it is the little board underneath the metal container at the top middle of the panel..the very top.

-Josh