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

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Repairing Samsung LA40R81BD 40in LCD TV Power Supply (clicking Relay Symptom): crwdns2935265:00crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

  • 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.

  • 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.

  • 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

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