From: ohg...@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.   
      
   The HU series *does* have intermittent issues with LEDs, either from   
   individual LEDs or the interconnects on the strips.   Sometimes you can change   
   just the bad LEDs or hardwire the interconnects if there is a voltage drop   
   across them, but the best    
   option is to order the complete set of strips from someone like ShopJimmy.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)