Samsung UN50KU6300F constant reboot, bad backlights?

[nomoresonys]

Just need to treat the panel like a baby, they are flimsy and fragile but fortunately it's 50 inches and not bigger, check some youtube videos on backlight replacement for procedure clues.

[nomoresonys]

Your led tester not doing anything is a pretty good clue that it's probably bad led/s in backlights.

[x_orange90_x]

"The screen very dimly lights" suggests the LEDs are working.

We're you able to view the video? They just blink on for like a second or 2. They don't stay on. The whole cycle is just a couple seconds long with the constant reboot and flash.

Probably failing backlights, maybe unplug backlight cable and cable from powerboard to mainboard, plug power cord in and check the output dcv at backlight connector.

I will try this. With them unplugged there should be steady voltage on the plug right? I had a similar issue a long time back, also with a Samsung, where the connectors between two LEDs strips was arcing, causing a constant flashing of the backlight. I don't recall there being anything visible on screen though, but that model may not have had a logo screen.

[nomoresonys]

Probably failing backlights, maybe unplug backlight cable and cable from powerboard to mainboard, plug power cord in and check the output dcv at backlight connector.

[diif]

"The screen very dimly lights" suggests the LEDs are working.

[x_orange90_x]

Here's the clip

[x_orange90_x]

This TV is in a constant reboot where the screen very dimly lights up for about 2 seconds and says SMART TV. I checked the power supply and visually all components look good. I unplugged the main board to see if the backlights would come on but they do not. I also tried my LED tester on the backlight plug and didn't get anything. I know some Samsungs will not light off a single led is out regardless of using a tester, so I'm thinking they are bad. I found a whole set for about $25 which isn't bad, but before I buy them is like to know if they would indeed cause a constant reboot like this tv is experiencing.

Attached is a short clip of it doing what it does.