6time power red light blinking

@sudhasudhakar Samsung officially does not use blink codes on these models (but 6 blinks relate to the backlight). Turn the TV to a channel where you can hear the sound. Next, use a flashlight and shine the beam at an angle against the screen. Do that in a darkened room. See if you can make out shadows or shapes. If you do, then it is your backlight that has failed.

If you do not see anything, unplug your set and remove the back cover. Now unplug the main board form the power board. Next plug the power cord into the power board. Your TV should now show a working backlight (no, no picture or sound, just the backlight). If it does then the issue is related to the backlight power circuit from the main board. If you do not have a backlight, then the issue is either with the backlight circuit on the power board or bad LED strips (those are the number one suspect).

You can check the voltages on your power board (use your multimeter in the 300VDC range when you measure the LED circuits. If unsure where and what to measure, post some good pictures of all of your boards with your Question. That way we can see what you see and hopefully help you further.

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