From: ohg...@gmail.com   
      
   On Monday, July 25, 2022 at 1:41:31 PM UTC-4, Peabody wrote:   
   > ohg...@gmail.com says...   
   > > There is another possibility however. Most Samsung LEDs    
   > > are built with a zener inside each die. Ordinarily, the    
   > > zener does nothing but if the LED fails open, the entire    
   > > voltage of the array will appear across the zener    
   > > causing it to conduct and (hopefully) short hard    
   > > effectively jumping out the bad LED. If it does, the    
   > > problem will fix itself until another wayward LED crops    
   > > up or if an interconnect gets resistive.   
   > If I connect my computer to the TV via HDMI, and display a    
   > competely white (all FFs) BMP image full screen, would I be    
   > able to detect an LED that's not lighting up?    
      
   Probably, but Samsung does a good job with their lens design on their back lit   
   models.  Think about it - there is a fair amount of dead space between LEDs as   
   they're laid out and generally you don't see the individual LED illumination   
   even on a plain    
   white display.  There will be *some* unevenness if an LED goes out, but it's   
   generally not dramatic, but your all white bit map pattern might show it.  Try   
   different brightness settings when you're looking at it.  I've also seen some   
   older Samsungs with    
   half the LEDs shorted and the customers didn't complain at all about the   
   picture until one opened and shut the array down.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)