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Question about Zenith L13V36 13" Flat Panel LCD Monitor

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Tv does not turn on

After watching TV on a regular base for about 4-5 days the next day it won?t turn on anymore. This lasts a few days and then it starts working again perfectly. Then after 4-5 days it does it all over again. But not only does the TV not turn on, even when it?s plugged in the red standby light is not on either, so I think it a power source problem or over heating, I?m not really sure I have tried different outlets around the house and still don?t work.

Posted by jessym on

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Ginko

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  • Zenith Master
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When TV does not start, and sometimes you hear a clicking noise, that means that 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.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.


If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Posted on Apr 17, 2009

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Here's two links that explain it, tell you how to test it and provide solutions:

http://www.coppelltvrepair.com/p/1173/lg-50pa5500-ua-top-buffer-board-replacement-for-tv-starting-with-no-image-problem-50-credit-for-old-dud

https://www.youtube.com/watch?v=z3dxCJ3CaTs

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