From: ohg...@gmail.com   
      
   On Tuesday, July 11, 2023 at 5:35:43 PM UTC-4, hub...@ccanoemail.com wrote:   
   > Anyone with experience or helpful advice on this -    
   > 2 ~ bright / white spots have appeared on the screen of our    
   > 42 inch LG LED TV    
   >    
   > LG 42LF5800 Sept. 2015    
   >    
   > Various google and youtube searches < as per usual >    
   > seem to lead into a rabbit hole of no return ...    
   > .. from cold re-starts to software / firmware updates    
   > to energy saving settings    
   > to pulling it apart and re-attaching the lenses on the LEDs ..    
   > I'm hoping to find a best-guess or diagnostic trick    
   > from someone who has been-there-done-that ..    
   > John T.   
      
   Very common - these drop lens.  You have to remove the screen and pick up the   
   leds and glue them back in position.  The position is more critical on these   
   than most types.  These use the top hat type lens instead of the dome type.    
   With the back light on,   
    glue the lens directly over the LED die or you'll get hot spots on the   
   screen.  By the time you get the screen apart, you'll probably discover more   
   have fallen off just from moving the TV around.    
      
   You'll have to stabilize the other ones that are still in place because the UV   
   light from the LEDs embrittle the adhesive.  I use clear RTV and put a tiny   
   drop on each and every lens.  You may find that when you touch the RTV to the   
   lens, the lens may    
   displace or fall off.  If so, recenter it properly.   
      
   If you like the TV and plan to keep it for years, then a better option is buy   
   a set of LED strips with the attached lens and replace everything behind the   
   screen.  More money but you won't have to worry about lens alignment or LEDs   
   that might fail in the    
   future.   
      
   This series is also an LED killer, so when you're done, lower the back light   
   adjustment, particularly if you're just resetting lens'.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)