LG 42LS560S Reboot repeatedly


My LG Television, now more than two year old, went sundenly in a non stop reboot mode. The television goes ON and shows the LG Logo and than turn Off again.

I highly appreciate any tipps or sugessting related to this problem.



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ahmed gatri ,

Here you can find service manual.

Troubleshoot should start from power supply

Start from basic level,

Visual inspection

  • Check 120uF 450V (primary)capacitor Swollen ? if yes replace it
  • Check secondary caps 100ouF 35V caps swollen ? if yes replace them

Check the output voltages mentioned on the circuit board

Check the optocoupler resistance : primary around 8Mohms secondary 2-3Kohms : if any deviation replace it

let us know if above steps not works to fix your TV then we can check the TV motherboard

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Thank you Buddhika,

I´m going to check out those steps and give a short feedback.




make sure capacitors are discharged before touch them. high voltage still can be loaded on primary capacitor. be careful friend!


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ahmed gatri will be eternally grateful.
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