My tv has no back light, but audio. I've done the flashlight test and i do see a menu bar, so i changed out both the tcon board and the main power source but still same problem.
SOURCE: lns4692d no picture
No it is the little board underneath the metal container at the top middle of the panel..the very top.
-Josh
SOURCE: sound no picture, which component is tcon board? where all audio/video/cable/hdmi plug in to?
I have LNS4692D. Returned from vacation, turned tv on - no picture. Tried turning tv off for 4 hours- nothing. Symptoms are: tv is on - no picture , just sound; menu doesn't show, volume bar doesn't show;E.Saving is working - the backlight is changing from lighter to darker.
Found this website and ordered T-con, otherwise known as the LCD panel driver board, p/n# Bn8101286a ( thanks premtech) from partstore.com for $124. Part number BN81-01286A A/S T-CON Board.
Installation:
1.Remove plastic cover. There is an arrow for each screw that needs to be removed. Make sure to unscrew pins next to VGA port. I've spent some time trying to figure out what else is holding the plastic panel until I found this pins.
2. Remove big metal shield in the middle of tv that is covering main components. This shield is being held by small black screws all around it.
At this point you will see cover of T-CON. Here is the picture
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=118863&d=1220531321 (thanks ldac9). Do not attempt to remove that cover yet. Proceed with a next step
3.Remove metal panel that holds main components. Locate big chrome screws that have arrows pointing to them and unscrew them. Remove 2 more screws on the bottom of the panel that holds it together with a box for cables. At this point the main panel will be lose
4. Carefully start lifting the panel. You will see that there are connectors going from components on the panel to components on the lower panel and T-CON. Carefully unplug these components and raise the main panel.
5. Remove 4 screws that holds T-CON cover. Pull the cover so that T-CON is completely exposed. The cover is connected by thin alluminum , don't hesitate to pull it , but don't rip it out.
6. Once T-CON is exposed you will see 2 red ribbons. I've spent some time to figure out how unplug those from old T-CON board. Here is the suggestion. Don't try to pull it out. All you need to do is to lift small plastic lever that is part of a connector. Then ribbon can be slided out. If not sure what to do, see how this is done on the new T-CON. It has a principle of buckle on airplain safety belts.
7. Remove old T-CON and install new you.
8. Follow reverse order.
I've never fixed TV before , but this was totally successful project.
SOURCE: Hello, I have a Samsung LN-S4692D.
You cannot test the T-Con bd with a meter. However if you have the luxury of having another same model tv, you can install the bought T-Con bd and see if it is good or bad. Since you said the Menu and channel flashses, then I would replace the Main board.
SOURCE: how to fix TV
If you are willing to take a chance...and you have some technical skills you may be able to repair it. I was able to replace 2 capacitors on my power board for under $5. I had no picture, no sound. Not saying that is what is your problem. Search the internet for your model number and no picture. I see several youtubes on yours as well.
Testimonial: "Thanks Rick, it's great that you were able to fix your TV for $5. I do not have technical skills, but will keep trying to watch videos to try to figure it out. If I get enough courage, I will try to open the back panel. Where did you get the capacitors?"
since you have replaced the main parts in the tv already it is safe to say you have bad led strip these can be tested with a 12v dc power supply
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