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   sci.electronics.repair      Fixing electronic equipment      124,925 messages   

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   Message 123,489 of 124,925   
   three_jeeps to All   
   Advice sought: Diagnosing & Repair of Sa   
   24 Feb 23 09:30:56   
   
   From: jjhudak@gmail.com   
      
   This TV is showing all the signs of a TCON or TAB failure.  The RHS of the   
   screen exhibits a combination of various issues: ghosting images, duplicated   
   images, solarized sections on the screen, what looks like 'interlaced lines'   
   on portions of the RHS,    
   and darkened areas.  Initially, the problems would clear themselves after the   
   TV was on for 2-3 min, then the time got longer, e.g. 20 mins.  Now it is   
   constant.   
   I removed the back and cleaned & reseated the 4 flex ribbon cables at the TCON   
   board which did not solve the problem.  The ribbon cables go off to the LCD   
   screen which I could not access.     
   It appears that I have to disassemble more of the TV to access the TAB areas.   
   (not obvious what all needs to be disassembled - comments?)   
      
   Assuming I get access to the TAB areas, how to repair them? Googling turns up   
   putting a padded 'shim' between the TAB and the frame, effectively pressing   
   the contacts together.  Another approach is to use a hot air gun and pressure   
   to rebond it. Not    
   clear what to use to put pressure on the entire length of the TAB area.   
   So my questions are:   
   1 - ways to diagnose the problem   
   2 - how to disassemble the set to access the TAB area   
   3 - best way to repair the TAB if in fact that is the problem   
   Any advice from ppl that have wrestled with the set is appreciated.   
   J   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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