From: thekmanrocks@gmail.com   
      
   On Thursday, July 21, 2022 at 12:01:15 AM UTC-4, Peabody wrote:   
   > Friends of mine have a Samsung 55" 4K TV, model UN55HU6840 (about 2014).   
   > They say they can hear audio, but the screen is black. I'd like to take a   
   > shot at fixing it for them since they don't really have the money to buy   
   > a new one. The encouraging thing is that until recently this has been an   
   > intermittent problem that's just gradually gotten worse, and now is   
   > permanent. But I'm encouraged to think it's not burned out LEDs, else it   
   > would never have been intermittent.   
   >   
   > I just told you everything I know about repairing TVs, but am generally   
   > experienced in electronics as a hobbyist. Based on some Youtube videos   
   > it seems I should take off the back cover and check all the connections.   
   > Then I would go to the power board and check the voltages on the lines   
   > going to the backlight LEDs, and if low, start checking diodes and   
   > electrolytics, and of course look for bad solder joints.   
   >   
   > Does this sound like a reasonable approach? Is there a typical cause of   
   > this symptom?   
   >   
   > I've had no luck finding a schematic. Does anyone know where I would   
   > find that?   
   >   
   > Well, any guidance would be appreciated.   
   ____________________   
   And once it is repaired, do not operate the set with the backlight set any   
   higher than 12(I believe Samsung backlight   
   scale is 1-20).  Use a higher Brightness(black level) setting to see detail in   
   darker parts of the image   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)