I have a UN55KS8000FXZA purchased 1/17 that has numerous issues cropping up over the past few months.
1.) I get flickering on power on, regardless of source input, as shown in the linked video below. It takes up to 5 minutes for this flickering to stop.
2.) I get vertical lines on power up sometimes, as shown in the picture below. Power cycling the tv does not fix this, and the only solution so far is to unplug and replug the main connector on the One Connect box.
3.) After an hour or so of use, I will start to get an auto dimming effect every second or two. I have disabled Eco Sensor and attempted disabling all other settings to no avail. However, if I turn the room lighting all the way up, it will stop flickering.
I've tried updating the firmware on the TV to the latest version with no change to any of the above symptoms. Any help would be appreciated.
The HDMI cable for the Xbox? I have tried using a different HDMI cable for it which made no change. The flickering at startup occurs even if I have no devices hooked up to the TV. It does it regardless of source, even on antenna. The vertical lines I've had go away by power cycling enough times in the past, but this most recent one just happened to go away when I unplugged and replugged the one connect cable at the one connect box.
If it comes back, feel free to send us a private message to the link with your serial number and your TV's firmware version.