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Power switch wont turn on,keeps clicking

Tv model 3 lnp4042hxxaa will not turn on. power button just clicks has been takeing longer to start but now won't start at all can i repair myself? i think it might be a relay??

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  • i4_ur_angel May 21, 2009

    i hope it is as easy as unplugging it because I have no idea what a fault, capacitator, convergence IC are-lol! I am just a nana trying to fix the tv so baby can watch einstien. hope it works and thanks

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  • Samsung Master
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The fault is not a relay, the clicking sound is just the protection circuit that prevents the TV from starting because a fault had been detected.

The TV is on protect mode.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible reasons.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.


If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.


Posted on May 21, 2009

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