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This is related to 3-4 1000uF 10v capacitors that need replaced with 1000uF 35v high temp capacitors. These broken caps are placed too near a heatsink for transistors and have blown due to the high temperature.
Your problem is typical of Samsung LCD TVs. The capacitors on one of the internal boards are rated at 10V and should be higher. If you open the case, you'll see bulging capacitors. If you can handle a screwdriver and soldering iron, you can actually fix it yourself with a few capacitors from an electrical supply store. Simply read the specs off the bulging capacitors and get a higher voltage-rated replacement. For exmaple, if the capacitors say "1000uf 10V 105C", you would replace them with "1000uf 35V 105C" or similar rating. Or an easier method: Recently, Samsung themselves have been making repairs as it is such a widespread problem. Call Samsung at 1-800-726-7864 and they may just repair it for free, even if its not under warranty.
check your power supply. remove it then remove the metal plates on top of the psu. ill bet you find 2x 1000uf 35V ,4 x 1000uf 10V and 3x 670uf 35V capacitors that are swollen or leaking. if you replace the 1000uf caps it will work but if the 670uf caps are swollen as well its a good idea to replace them as well. the 1000uf capacitors can be bought at radio shack for around 10 dollars. you can use the 1000uf 35V caps for the 1000uf 10V caps if you cant find the 10V ones . the 35V caps are a little bit bigger but still work . you will need a good soldering iron (35-60 watts) and a good desoldering tool . easy to do if you know how to solder.
A common fault with this model is bad capacitors in the power supply, Remove the back from your tv and look at the power supply for bulged / swollon capacitors on top, they may even leak a brown like substance and should have a value of around 1000uf 10v Change these where possible with the same uf but higher voltage lets say 1000uf 25/35v Hope this helps Please rate my reply++++
A common fault with this model is bad capacitors in the
power supply, Remove the back from your tv and look at
the power supply for bulged / swollon capacitors on top, they may even
leak a brown like substance and should have a value of around 1000uf 10v Change
these where possible with the same uf but higher voltage lets say
1000uf 25/35v Hope this helps Please rate my reply++++
same thing happened to my ilo. There are four capacitors that are bad
on the power board. You can usually tell its bad because at the top it
bulges out. Here is what you need to do. Unplug the tv, open up your
ilo find the power board ( the power cord plugs into it). Then find the
capacitors that are bad (they are the around things usually in blue
color) and remove them by soldering the other side. On mine there where
three 1000uf 16v and one 470uf 35v. Those are the ones that need
replacing. I replaced them with a higher voltage rating 1000uf 35v and
470uf 50v. All you need to do is solder them back on but make sure you
solder them back the right way (plus goes to plus on the board or you
will be in trouble). I found the capacitors at radio shack for about
1.50 a peice. If you dont know how to solder look it up on youtube. If
that does not work there might be couple more bad capacitors that need
replaceing just need to find them and you can tell by a small bulging