UN70NU6900FXZA power cycle, no picture - workaround found

[nomoresonys]

Re: UN70NU6900FXZA power cycle, no picture - workaround found

those ribbon cables won't last too long at that rate, too delicate.

[MikePCS]

Re: UN70NU6900FXZA power cycle, no picture - workaround found

If you still have this tv it is a good candidate to test the method here.
Can you measure voltage on both sides of R13246 on the main board, and ground? If it measures significantly below 25VDC your fix is likely in the thread below.

https://www.badcaps.net/forum/showthread.php?t=107445

I do have the TV still, Ive been leaving it powered on, and it has been fine.

I hung it back on the wall with the rear cover off, so if it accidently turns off I just disconnect the ribbon and plug it back in.

I have gotten pretty good at this, where I don't even have to look behind the TV anymore. I can do it all by feel

However I would love a permanent fix. I will do some testing and report back.

[itelite]

Re: UN70NU6900FXZA power cycle, no picture - workaround found

If you still have this tv it is a good candidate to test the method here.
Can you measure voltage on both sides of R13246 on the main board, and ground? If it measures significantly below 25VDC your fix is likely in the thread below.

https://www.badcaps.net/forum/showthread.php?t=107445

[dskall]

Re: UN70NU6900FXZA power cycle, no picture - workaround found

I would try running a wire from 12v up to t-con. Or monitor the voltage. They maybe marginal on their conductors on power lines to panel.

[MikePCS]

Hello,

I have a just of warranty 70" Samsung 6-series that out of the blue stopped getting a picture, but I had sound. During the initial outage, the picture came back momentarily and then faded out. The next morning the TV worked on a quick test, but trying it again later it didn't.

When I have the mainboard disconnected from the power supply, the TV powers on with full LED brightness and stays on

When I plug the mainboard in, the LEDs go bright-->dim--off -->repeat, while the red status indicator blinks 2x

WORKAROUND: Unplug one ribbon cable from mainboard to panel - (doesnt matter which) - turn on TV, and reconnect ribbon while TV is on - I get a normal looking display.

Sometimes I can turn the TV off/on - even disconnect cord from outlet - and the TV still works! Other times it doesn't and I have to repeat the process.

This person seemed to have an identical problem (even the same voltage readings) but there was never an outcome posted

https://www.badcaps.net/forum/showthread.php?t=98468

I know these units have panel issues, but based on my experiments Im still not sure if its a mainboard causing this.

Any help would be appreciated if this unit can be salvaged!