Samsung LA40R81BD

Repairing Samsung LA40R81BD 40in LCD TV Power Supply (clicking Relay Symptom)

 

 

Samsung Power Supply (clicking Relay Symptom)

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  Inspect all electrolytic capacitors on the power supply board and replace any that are bulging or leaking.
  
  
  
  
  


• 
  
  On my board there were 2ea 2200uf capacitors that were bulging.
  
  
  
  
  


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  Remove the old capacitors ensuring you don't overheat or damage the copper pads/tracks on the circuit board
  
  
  
  
  


• 
  
  
  Take care to ensure you install the new capacitors
  correctly. They are polarity sensitive and the board and capacitors
  will be clearly marked which way they should be inserted.
  
  
  
  
  


• 
  
  
  You may want to check and replace any adjacent capacitors that are rated 10V as these seem to be the ones likely to fail.
  
  
  
  
  


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  In my case I also replaced the 1000uF capacitor
  
  
  
  
  


• 
  
  
  If you have a different model TV the layout of the power
  supply board may be different however the faulty capacitors should be
  easily identifiable.
  
  
  
  
  


• 
  
  
  If replacing the capacitors does not resolve your
  symptoms you may need to replace the eprom on the main board as it can
  be corrupted or damaged by the power cycling