![]() ![]() I successfully reset to factory settings once, and also updated the firmware to the latest as my first steps, before cutting the jumper. ![]() What is the likely cause of such a symptom? Does it have anything to do with HDTV or Blu-Ry resolution signals. I haven't tried that, and I don't have any duplicate circuit boards to swap in. ![]() Any further ideas? One fellow suggests dragging a soldering iron carefully and briefly across the solder connections on the ribbon insert connectors on each of the two boards it connects to. They all appear firmly and properly inserted. I have disconnected all wired cables and flex ribbon cables between all boards and reconnected them to no effect. Wiggling or tapping the inputs did not and does not have any effect. The lines are now permanently black even after a long warm up, and appear on images from all sources, including the self-diagnosis internal test photo, as before. This didn't fix anything right away, but after letting the TV sit for a few days, the flickering problem was gone. I figured I had two overlapping problems, and so cut a jumper (JP584 I believe) on the power supply board something that was suggested online to fix strobing or flickering, since the power supply electrolytic capacitors didn't seem the least bit swollen and I still had power. It had evenly-spaced, thin vertical black lines about 2 or 3 mm apart, and after warming up also started to flicker, which made the black lines cycle through different colors, and sometimes the picture would go negative in color. Hi I inherited a problematic Samsung 55 inch LCD TV (2010 model LN55C610) recently. ![]()
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