@satishkuma73529 @chrisinsley and all on here. So, there is a lot of stuff going on here. Lets try and refocus on this issue. We all know that the larger Samsung TV with the NU designation, has a lot of panel issues. You will still have to do the common check to rule the panel in/out. So start with your power board. Unplug your TV. Remove the back panel (it's a beast because of size). Now disconnect the main board cable from the power board. Now plug the power cable into the power board. this should turn the power supply on and your back lights should come on. you can see those through the holes in the metal of the LCD panel. If they do, good. That means power supply is A-Ok. If not, bad= power supply.
Next, disconnect the power cable. Reconnect the main board. Disconnect one of the ribbon cables from the T-con board to the LCD driver boards.. Those are the "long , skinny boards" that connect directly to the LCD panel. Now turn the TV on. Let us know what happens. Turn the TV off, disconnect the power cable. Reconnect the ribbon cable you disconnected and disconnect the other one. Reconnect the power cable and turn your TV on. Let us know what happens. What you should expect is that at least on side will let one half ot ht eTV panel work. That is why it is important to know what happens when you d/c those cables. One at a time and always disconnect the power.
Ultimately it does sound like a bad panel (LCD driver board. There are no schematics for those, nor are they replaceable by the normal DIY'er, due to the process with which they have been fastened to the panel. The only thing that one could try is a Tape -off. This only works about 3/4 of the time so there are no guarantees. It only works if it is the panel that has failed. It will not do anything if this is caused by a bad T-con board etc. Since nobody has posted any pictures of that, we can not mark test points for voltage checks on that. The larger the panel, the more LCD driver board your panel has, the more difficult it is. If you have more than 1 driver board per side, you will have to disconnect them as well and check those the same way as you checked the ones coming from the T-con board. Disconnect power, disconnect ribbon cable from one driver board to the next, reconnect power and turn on. Results? Anyhow a bunch of pictures would make a difference in explaining this. Anyhow, here are some examples of how to perform the Tape -Off.
https://www.youtube.com/watch?v=pfrRhw7-...
https://www.youtube.com/watch?v=zGAVbMQr...
https://www.youtube.com/watch?v=atNmhu7H...
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10 Commenti
Hi. Have you solved your problem?
da sharapat_90
Have you found out how much it is to repair? We just had the same thing happen with our 70” Samsung. Exactly the same thing, stuck in the loop of on/off after two red blinks. Purple-ish hue
da Gerald Redwine
Ive seen this happen and the only way to fix it is to send it to Samsung but its not gonna be cheap let me tell you. Theres probably a way to fix it that im unaware of but I would just send it to Samsung.
da Chickinuggi
Mines doing this same thing but if you let it just sit for so long it will eventually turn on.
da Ryan Lancey
Same thing happened to me today and did everything but nothing worked. Tech profet have a video to cover pins on the belt however haven't tried it
da Emma
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