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I have bad 1200 microfarad caps on my power supply of my 52 inch LG tv. Voltage ratings are 35V. I have some 1500 microfarad by 50 v caps that would physically fit in their place. Would these work in place of the 1200? I know voltage rating is ok.

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Do not use the 1500. One thing to remember about electrolytic's is this. The microfarad must be to spec. But you can always up the voltage. ie use a 1200 by 50V instead of a 1200 by 35V

Posted on May 20, 2011


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Hi Sir Saeid Manzari,

Right, that problem is cause of faulty power supply..

The first thing I suggest is to open the back cover of your TV then find the power supply board (it is usually found connected directly to the power cord)..After you find the power supply kindly inspect the condition of all capacitors,commonly then faulty capacitors look like leak/bulged on the top but sometimes not and looks fine..

see this picture.

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The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.

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You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

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I cannot say this with authority, since I own a 1200 model, but from what I've read of that model researching my own it's most likely the power supply. It is repairable if you or someone you know can solder. Here's what I found:
I did pretty much the same to my 1200, replaced two 2200uF caps with 35V versions. Make sure the rated voltage of the new caps is at least 16V! Higher is better. There's also a firmware update for that model, you might want to look into that too. Of course, you can't use it until this is fixed.

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